JPH09261897A - Power load adjusting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically measure the amount of power consumed by a customer, ensure power supply to machinery and apparatus required for the customer, and further stabilize electric power supply. SOLUTION: Electric machinery and apparatus used by customers are classified into adjusted loads 74A, 74B and non-adjusted loads 73. Each customer is provided with a customer slave station 7 that has a control means capable of open/close-control on a feed circuit for groups of machinery and apparatuses classified under the adjusted load, and outputting data on the amount of consumed power. A master station 5b is placed in the high-voltage distribution line system on the supply side, and is connected with the customer slave stations so that signals can be communicated between them. The master station contains a control means that receives and stores data on the amount of power consumed by each customer and is capable of outputting signals for controlling the feed circuits of the customers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power load adjusting system for remotely controlling a power consumption amount of a customer so that power supply does not become insufficient at the peak of power consumption.

[0002]

2. Description of the Related Art A power supply path from a substation to equipment used by each consumer will be described with reference to FIG. 7. First, in a substation 1, a busbar 11 to a circuit breaker 12 and a zero-phase current transformer (ZCT). High-voltage distribution line systems 1, 2, ..., N that are led out through a detection device 13 including a grounding transformer (GPT), etc.
Are located in the supply area. This high-voltage distribution line system
It is divided by switches S1, S2, ~ Sn so that it can be connected or disconnected, and transformers T1, T2, ~ Tn for stepping down to a low voltage for consumers are provided in this area, and the output is a low voltage distribution line. 32 through the service line 33 to the customer facility 4, where the electricity meter 41 and the breaker 4 are connected.
2 to the load 43 of the electric device.

Furthermore, the circuit breaker 12 in the substation 1
The circuit breaker 12 when the detection device 13 detects a system abnormality
A controller 14 for controlling opening and closing is attached. In addition, in order to remotely control the opening and closing of the circuit breaker 12 through the controller 14, a parent station 5a is provided in the power supply and demand management facility such as the substation facility 1, a sales office (not shown), and the parent station 5a and the controller. 1
4 is connected by a communication line 6.

In addition, the switch Sn that divides the high voltage distribution line includes a switch slave station 2a that controls the switch Sn to open and close based on an abnormality in the system area detected by the detection device 21 including a current voltage sensor. This switch is attached to this switch slave station 2a
A control means for remotely controlling the opening and closing of the switch Sn through is provided side by side with the master station 5a provided in the power supply and demand management facility (not shown), and the master station 5a and the switch slave station 2a are provided. And are connected by a communication line 6. And in this way, when a failure occurs in the high voltage distribution line,
The failure area can be separated from the system automatically or by remote control from the master station 5a.

In the power supply system configured as described above, the power supply and demand management department provided in a substation or a sales office positively operates the power when the peak of daily fluctuation of the power consumption increases abnormally. There was no way to improve the tight supply situation, and there was no choice but to rely on indirect measures such as power interchange between electric power companies, encouragement of transfer holidays, and other calls to save electricity to large consumers. In addition, since the method of measuring the electric power consumption of each customer by meter reading by the patrol staff for each door is adopted, there is a problem that the electric power consumption in the grid cannot be grasped promptly.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and even when the power consumption tends to be tight, the power consumption tends to be tight. Provided is a power load adjustment system capable of stabilizing power supply while securing power supply. Furthermore, it also provides an electric power load adjustment system capable of automatically measuring the amount of electric power used by a consumer.

[0007]

A power load adjusting system of the present invention which solves the above-mentioned problems is a device group classified into a regulated load among power devices used by a consumer classified into a regulated load and a non-regulated load. A customer slave station equipped with a control unit that enables opening and closing of the power supply circuit to and output of power consumption data is provided for each power consumer, and signals can be transmitted and received to and from these customer slave stations. In addition, the master station equipped with a control means that receives and stores the power consumption data of each consumer and outputs a signal for controlling the power supply circuit of the consumer is the source of the high voltage distribution line system. It is characterized in that it is provided on the side.

Further, the present invention for solving the above problems is embodied in the following modes. (1) The power load adjusting system, wherein the consumer slave station and the master station are connected via a relay slave station.

(2) It has a function of controlling a switch that divides the high-voltage distribution line system into a plurality of areas so that it can be connected to and disconnected from each other, and based on the control signal of the master station, The power load adjustment system according to (1), in which a switch slave station including a control unit that enables output of a signal for controlling a power supply circuit of each consumer to which the switch belongs is provided as a relay slave station.

(3) It is connected to the output side of the transformer provided in the high voltage distribution line system, and based on the control signal from the master station,
A transformer slave station provided with a control unit that enables output of a signal for controlling a power supply circuit of each consumer belonging to the low-voltage distribution line on the output side of the transformer is provided as a relay slave station, and the transformer slave station is provided. The power load adjustment system according to (1) above, wherein a transmission / reception number between the device slave station and the consumer slave station can be carried by a low voltage distribution line and a service line to each consumer.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS. First, according to the present invention, a consumer slave station as shown in FIG. 1 equipped with a control means capable of controlling the opening / closing of a power supply circuit to a power device used and outputting the power consumption data for each power consumer. The feature is that 7 is provided. Further, here, at least two of the power equipment in the customer facility, that is, a group of equipment essential to daily life (referred to as unadjusted load) and a group of equipment that may be unavailable for a short time (referred to as adjusted load) are used. They are trying to control the feeding circuits separately by dividing them into species.

In FIG. 1, the customer slave station 7 is supplied with the power supplied through the service line 33 to the electric power devices which are grouped into a non-adjusted load 73 and adjusted loads 74A and 74B in this embodiment. A watt hour meter 71 and a breaker 72 are provided for adjusting the load 74A, 74
B is provided with switches 75 and 75 with an operating section, respectively. Here, the non-adjustment load 73 is typically a cooking device such as a range essential for daily life, a refrigerator, a lighting device, and the like, and the adjustment loads 74A and 74B are coolers that may be disabled for a short time. The equipment, the boiler equipment, etc. may be agreed upon with the customer, and the adjustment loads 74A and 74B may be distinguished from each other depending on the degree of necessity of the equipment.

Further, in the slave station 7, a communication device 76 having a transmission / reception function connected to a communication line 6 communicating with the outside and an arithmetic circuit 77 connected to the communication device 76 are provided. Data of the electricity meter 71 together with a function of transmitting a signal for disconnecting one or both of the adjustment loads 74A and 74B to the required switch 75 with an operation unit based on the received control signal from the outside. Is given the function to process so that it can be sent to the outside. It is preferable that the arithmetic circuit 77 is provided with a code addition / identification circuit 78 so as to modulate and demodulate a signal to be transmitted / received and to identify its own station in signal transmission / reception.

Further, the next feature of the present invention is that the communication line 6 is capable of transmitting / receiving a signal to / from each of the consumer slave stations 7 to 7 described above.
Output based on the power consumption data received from each of the consumer slave stations 7 to 7 and the power supply capacity data that is input in advance. The parent station 5b having a control means that enables the power supply is provided in the power supply side of the high voltage distribution line system, for example, in the power supply and demand management department provided in the substation or the business office.

When the control means of the master station 5b is illustrated together with its function based on FIG. 2, an information signal from the slave station 7,
For example, a communication signal of power consumption data is transmitted by a communication line 6 formed of an electric signal line or an optical fiber, and passes through a communication device 51 which is a transmitter / receiver and an input demodulation circuit 52 which demodulates the modulated data, The data is processed by the arithmetic circuit 53, in this case the software stored in the ROM 54, and RAM as required format data.
It is configured to be recorded at 55.

When the power consumption increases abnormally and it becomes necessary to adjust and control the load of each customer, either or both of the adjusted loads 74A and 74B of each customer are disconnected. A control signal for transmitting via the output modulation circuit 57 and the communication device 51, and via the communication line 6 to each consumer slave station 7
Is configured to be transmitted to. In addition, in the master station 5b, new information and data can be appropriately input or updated by the input device 58. Further, various information and data of the master station 5b can be appropriately displayed on the display 59.

Then, the master station 5b thus constructed
Can receive the power consumption data from the consumer slave station 7 and grasp the current power consumption status of all the consumers under the high voltage distribution line system in real time. Also, if necessary,
For example, when the power supply may be tight, a control signal is transmitted to the consumer slave station 7 of each consumer to disconnect one or both of the regulated loads 74A and 74B. The switch 75 with switch can be controlled. As described above, according to the present invention, since it is possible to control the adjustment load of each consumer belonging to the master station 5b as a unit, it is possible to always secure the power supply to the consumer's essential equipment. is there. In addition, since it will be possible to automatically calibrate the power consumption of consumers,
It is possible to abolish the conventional meter reading that relies on manual labor.

In this case, the contracted electric energy of each customer and the breakdown thereof, for example, the data such as the unadjusted load electric energy and the electric energy of the adjusted loads A and B are stored in the contract information memory 56 in advance, and If the power consumption of the house can also be calibrated separately for the non-adjusted load power amount and the adjusted load A and B power amounts, by comparing this used power amount data with the previous contracted power amount data, It is possible to make a selection such as disconnecting one or both of the regulated loads 74A and 74B so that the influence exerted depending on the usage status of each consumer can be minimized. It is convenient that the master station 5b is provided with a telephone 62 connected to the telephone line 63 so that information can be transmitted / received to / from the consumer using the telephone line 63.

Next, a second embodiment in which the consumer slave station 7 and the master station 5b in the above embodiment are connected via a relay slave station will be described with reference to FIGS. 3 and 4. Although the consumer slave station 7 and the master station 5b in the above-described embodiment have been described as being directly connected by the communication line 6, the present invention provides a relay slave station between the consumer slave station 7 and the master station 5b. It can be embodied by intervening. As such a relay slave station, a relay slave station for signal amplification when the consumer slave station 7 and the master station 5b are in a long distance, or a switch S of a high voltage distribution line system
It is possible to exemplify a relay slave station that shares the control of the consumer slave station for each consumer group belonging to the area formed by the above or each consumer group that is supplied with power by the low-voltage distribution transformer T.

In FIGS. 3 and 4, as the relay slave station as described above, a switch child which shares control of each consumer slave station in each area formed by the switch S of the high voltage distribution line system. An example of setting the station 2b is shown. In this embodiment,
As shown in FIG. 3, electric power is supplied to the individual customer facilities 4 by the low voltage distribution line 32 led from the transformer T1 provided in the area divided by the switches S1 and S2 of the high voltage distribution line system 2 and the service line 33 from the low voltage distribution line 32. Based on the abnormality signal of the system area detected by the detection device 21, the supply route and the switch S1 are
A switch slave station 2b for controlling the opening and closing of the switch Sn is attached,
The point that the master station 5b for remotely controlling the switch Sn through the switch slave station 2b is connected and provided by the communication line 6 is that the conventional master station 5a shown in FIG.
The distribution line path provided with the switch slave station 2a is used.

In this embodiment, the customer facility 4 is provided with a customer slave station 7 similar to that illustrated in FIG. 1, and the switch slave station 2b as a relay slave station is provided with a switch Sn. It is set to have both the function of controlling and the function of controlling the consumer slave station 7, and at the same time, the master station 5b is composed of the input / output communication circuit, the arithmetic circuit, the memory circuit, etc. illustrated in FIG. It is set to have both a function for remotely controlling the switch Sn and a function for remotely controlling the consumer slave station 7 through the switch slave station 2b. And master station 5
b and the switch slave station 2b are connected by a communication line 6 as in the conventional case, and the switch slave station 2b and the consumer slave station 7 are connected by a communication line branch line 61.

As an example of the control circuit included in the switch slave station 2b, as shown in FIG. 4, the ROM 23 in which the calculation software is stored and the RAM 24 which is a rewritable memory circuit are shown.
With the arithmetic circuit 22 connected to the center as the center, on the high voltage distribution line side, a determination circuit 25 for determining the degree of an abnormal signal from the detection device 21 or an operation circuit 26 for issuing a control signal to the switch S is arranged. There is. Further, on the communication line side, a communication device 29 for receiving an information signal such as power consumption data transmitted from the consumer slave station 7 through the communication line 61 or transmitting processing information, demodulated modulated input. An input demodulation circuit 27, an output modulation circuit 28 for modulating the output of the information processed by the arithmetic circuit 53, and the like are arranged, and between the detection device 21 and the master station 5b and between the consumer slave station 7 and the master station. It is configured to mutually receive, process and transmit information between 5b.

In this embodiment, the equipment configuration of the master station 5a and the switch slave station 2a for remotely controlling the switch Sn is used, and a function for remotely controlling the consumer slave station 7 is added. Therefore, the master station 5 that has been conventionally installed
In addition to the advantage that the switch station slave station 2a or the communication line 6 can be used, there is an advantage that the system construction cost does not become high, such as the information processing means of the master station 5b can be simplified.

Next, as a slave station for relaying between the consumer slave station 7 and the master station 5b, a transformer slave station 8 provided for each transformer Tn for switching from the high voltage distribution line to the low voltage distribution line is interposed. A third embodiment will be described with reference to FIGS. In this embodiment, a transformer slave station 8 is provided on the output side of the transformer T instead of the switch slave station 2b in FIG.
The difference from the second embodiment is that most of the communication line branch lines 61 connecting the consumer substation 7 and the transformer substation 8 are shared by the low voltage distribution line 32 and the drop line 33. By the way.

As an example of the control circuit included in the transformer slave station 8 in this embodiment, as shown in FIG. 6, an arithmetic circuit 82 in which a ROM 83 in which arithmetic software is stored and a rewritable memory circuit RAM 84 are connected. , A communication device 89 for receiving an information signal such as power consumption data transmitted from the consumer slave station 7 or for transmitting processing information, an input demodulation circuit 87 for demodulating a modulated input, An output modulation circuit 88 and the like for modulating the output of the information processed by the arithmetic circuit 82 is arranged, and is configured to mutually receive, process, and transmit information between the consumer slave station 7 and the master station 5b. ing.

In this embodiment, the existing communication line between the master station 5a and the switch slave station 2a for remotely controlling the switch Sn is used to connect between the consumer slave station 7 and the transformer slave station 8. Since the signal is carried by utilizing the low voltage distribution line 32 and the lead-in line 33 for communication, there is an advantage that the present invention can be applied to a conventional distribution line system very easily. Further, the transformer slave station 8 can be implemented with a simple structure as a relay means for a carrier signal by the communication line 6 and the low-voltage distribution line 32 without providing a transmission / reception control means.

[0027]

Since the power load adjusting system of the present invention is configured as described above in detail, even when the power consumption tends to be tight, the power supply to the necessary equipment for the consumer is required. It is possible to provide a power load adjustment system that can stabilize the power supply while securing the supply. In addition, it is possible to automatically calibrate the amount of electricity used, which saves labor and speed by eliminating the meter reading by inspectors who go around each customer, and quickly grasps fluctuations in power consumption in the grid in a timely manner. There is an excellent effect such as smooth power supply. Therefore, the present invention has an extremely great industrial value as a power load adjustment system that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a circuit diagram for explaining a consumer substation.

FIG. 2 is a circuit diagram for explaining a master station.

FIG. 3 is a main part system diagram of a distribution line using a switch slave station.

FIG. 4 is a circuit diagram for explaining a switch slave station.

FIG. 5 is a main part system diagram of a distribution line using a transformer slave station.

FIG. 6 is a circuit diagram for explaining a transformer slave station.

FIG. 7 is a main part system diagram of a conventional distribution line.

[Explanation of symbols]

1 substation facility, 2a, 2b switch slave station, 32 low voltage distribution line, 33 drop line, 4 customer facility, 5a, 5b parent station, 6 communication line, 7 customer slave station, 73 unadjusted load,
74 regulated load, 8 transformer slave station, Sn switch, Tn
Transformer.

Claims (4)

[Claims] 1. A control that enables opening and closing of a power supply circuit to a device group of electric power devices used by a consumer classified into a regulated load and a non-regulated load and classified into a regulated load, and output of electric power consumption data. A consumer slave station equipped with a means is provided for each power consumer, and signals are connected to these consumer slave stations so that signals can be transmitted and received to receive and store power consumption data of each consumer. A power load adjusting system, wherein a master station provided with a control unit capable of outputting a signal for controlling a power feeding circuit of a house is provided on a supply source side of a high voltage distribution line system. 2. The power load adjusting system according to claim 1, wherein the consumer slave station and the master station are connected via a relay slave station. 3. A high-voltage distribution line system is provided with a function of controlling a switch that connects and disconnects to a plurality of areas so that the high-voltage distribution line system belongs to the area defined by the switch based on a control signal from the master station. The power load adjusting system according to claim 2, wherein a switch slave station having a control unit that enables output of a signal for controlling a power supply circuit of each consumer is provided as a relay slave station. 4. A power supply circuit of each consumer, which is connected to an output side of a transformer provided in a high voltage distribution line system and belongs to an output side low voltage distribution line of the transformer based on a control signal of the master station. A transformer slave station equipped with control means that enables the output of a signal for control is provided as a relay slave station, and the transmission / reception number between the transformer slave station and the consumer slave station is a low-voltage distribution line. The power load adjusting system according to claim 2, wherein the power load adjusting system can be carried by a service line to each customer.