JPH08317558A - High voltage receiving equipment - Google Patents

Abstract

PURPOSE: To provide high voltage receiving equipment which can perform operation management precisely for a load and relieve and economical burden. CONSTITUTION: The load factor control and the load control of plurality of power transformers 3-1-3-3 are managed unitedly by one power management meter 6a. The measurement and indication of various power values are made by the functions of respective circuits for demand control mounted on the power management meter 6a, and demand control is made in addition to the load factor control by one apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high-voltage power receiving equipment provided with a power management meter for managing information such as electric power in high-voltage power reception.

[0002]

2. Description of the Related Art In recent years, power management meters for high-voltage power receiving equipment have been digitized and combined, and one power management meter has been used to display various kinds of power information.

Here, as the information on power, voltage, current, active power, apparent power, reactive power, analog value that continuously changes at every moment such as power factor and temperature, and active power amount and reactive power amount. Is an integrated value for each predetermined period. In addition, there is a device that outputs a demand value that is a time-averaged power within a specific time.

A high voltage power receiving facility using such a conventional power management meter will be described below with reference to FIGS. 4 and 5. FIG. 4 is a single wire connection diagram of a conventional high voltage power receiving facility. In FIG. 4, 1 indicates the entire high-voltage power receiving equipment, 2 indicates a high-voltage load switch for the main circuit, 3-1 to 3-3 indicate a power transformer, 4 indicates a low-voltage breaker for wiring the low-voltage branch circuit 9, and 6
Is a power management meter, 7 is a transformer for a high-voltage meter for measuring the voltage of the high-voltage main circuit, 8-1 is a high-voltage current transformer for measuring the current of the high-voltage main circuit, and 8-2 to 8-4 are power transformers. 3-1-3
-3 is a low voltage current transformer for current measurement, and 10 is a low voltage side voltage input.

FIG. 5 is a block diagram showing the power management meter 6 of FIG. The input to the power management meter 6 is
The high-voltage instrument transformer 7 and the high-voltage current transformer 8-1 in FIG. 4 correspond to the high-voltage main circuit measurement input 13, and the low-voltage side voltage input 10 and the low-voltage current transformers 8-2 to 8-4 are the first to the first. 3 corresponding to the power transformer measurement inputs 14-1 to 14-3.

The power management meter 6 is composed of various electric power amount measuring means 6-1 and electric power transformer load factor calculating means 6-2, and display means 6-10 of the same measurement result and calculation result.

As described in the above-mentioned configuration, the power management meter 6 is intended only to display the data of measurement and calculation results of various electric power amounts. Next, 15 is a demand control device, and its pulse input 16 receives a pulse supply from a transaction meter of an electric power company. On the other hand, the demand control output 19 output from the demand control device 15 based on the pulse input 16 is the distributed end load 1
The power supply to 8 is controlled by opening and closing the control switch 17.

[0008]

However, in the conventional high-voltage power receiving equipment as described above, there is no one that centrally controls and manages the load factor over all of the plurality of power transformers. There is a problem that the load factor of the transformer cannot be managed individually and properly, and therefore the capacity of the power transformer must have a sufficient margin more than necessary.

Further, the demand value can be suppressed by controlling the load by the demand control. However, since the load control in this case has a time lag, this load control is
In many cases, it is out of the target of the control load, so that there is a problem that it is not possible to carry out fine demand management.

Further, in general, in demand control, control circuits for individual loads are concentrated in the demand control device and controlled by this demand control device.
There is a problem in that the demand control device requires a large number of wirings from the respective distributed loads, which increases the economic burden.

According to the present invention, the above problems can be solved, the proper operation management can be precisely performed against the load, and the cost increase for the installation can be suppressed and the economic burden can be reduced. The purpose is to provide high-voltage power receiving equipment.

[0012]

In order to achieve the above object, the high-voltage power receiving equipment according to claim 1 of the present invention manages various quantities related to power measured from voltage values and current values in high-voltage power reception. In a high-voltage power receiving facility including a management meter, the power management meter calculates a load factor of a power transformer based on load factor control based on various amounts of power, and a load of the power transformer. A load factor determination unit that determines a rate and outputs a load switching command according to the determination result, and a load factor switching that outputs switching information for a load factor control load capable of connection switching based on the load switching command. A control output means is provided, and based on the switching information output from the load rate switching control output means, the load rate controlling load aggregated in the load rate controlling dedicated branch circuit is set. A structure having means for switching the load factor control load selector switch.

The high-voltage power receiving equipment according to claim 2 is a high-voltage power receiving equipment including a power management meter that manages various amounts of electric power measured from a voltage value and a current value in high-voltage power reception. Demand measurement means for obtaining a demand value for demand control based on various quantities related to the electric power, and outputting a load control command according to the demand value; and a demand controllable demand based on the load control command. A demand load control output means for outputting control information for the control load, and based on the control information output from the demand load control output means, the demand control load integrated in a dedicated branch circuit for demand control Is configured by a means for controlling the demand control switch.

[0014]

According to the structure of claim 1, the load factor control and the load control of the plurality of power transformers are centrally managed by one power management meter.

According to the second aspect of the present invention, the function of each means for demand control provided in the power management meter measures and displays various electric power amounts, and the load factor control is performed by one device together with the demand control. It also controls.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The high voltage power receiving equipment of the embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that parts and portions having the same functions as those of the conventional example shown in FIGS. 4 and 5 are designated by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a single-line connection diagram showing the configuration of the high-voltage power receiving equipment of this embodiment, FIG. 2 is a configuration diagram of the power management meter of the same embodiment, and FIG. 3 is power management of the same embodiment. It is a block diagram of the principal part of a total.

1 and 2, FIGS. 4 and 5
1 is different from the conventional example shown in FIG. 1 in that in the power management meter 6a, the load factor determination unit 6-3, the load factor switching control output unit 6-4, the demand measurement unit 6-5, and the demand load control output unit 6 are included. -6, a controllable load capacity setting means 6-7, a controllable time setting means 6-8, and a reducible demand value calculation means 6-9.

The other is, in the high voltage power receiving equipment 1a,
A dedicated branch circuit 9a for load factor control that switches loads depending on the load factor of the power transformers 3-1 to 3-3, a load factor control load changeover switch 5-2 to 4, a dedicated branch circuit for demand control that collects demand control loads. 9b, a demand control switch 5-1 for load control by demand control is provided,
The point is that the conventional low-voltage branch circuit 9 for general load is 9c.

Further, as shown in FIG. 3, the controllable load capacity setting means 6-7 and the controllable time setting means 6-8 can be set for each control circuit. Regarding the function and operation of the high voltage power receiving equipment configured as described above,
This will be described below.

First, the load factor control of the power transformers 3-1 to 3-3 will be described. Here, the load factor control load 11 is connected to the power transformers 3-1 to 3-3 via the load factor control dedicated branch circuit 9a and the load factor control load changeover switches 5-2 to 4-4. And

The power transformer load factor calculation means 6-
2, the load factor of each power transformer 3-1 to 3-3 is calculated, and as a result, the load factor of the power transformer 3-1 is 10
When it exceeds 0%, the load factor determination means 6-3 issues a command to switch the load factor control load 11 to one of the power transformers 3-2 and 3-3 having a lower load factor, the load factor switching control output means. 6-4, and this load factor switching control output means 6-
4, the load factor control load changeover switches 5-2 to 4 are operated to switch the load factor control load 11 to the low load factor side.

By the operation of each of the above means, it is not necessary to provide a plurality of electric power transformers with an excessive load capacity, and proper operation can be performed by controlling the load factor of the electric power transformers, which is safe and reliable. It is expensive and the equipment can be made small capacity. Since the branch circuit is specified for the load described above, reliability is secured by consolidating and connecting the loads that are not affected by the instantaneous blackout due to switching.

Next, demand control for the load will be described. First, the demand measuring means 6-5 calculates a predicted demand value from the measurement result of the electric power amount measuring means 6-1 and further issues a load control command to the demand load control output means 6-6 when the demand is exceeded. As a result, the demand control loads 12 connected to the demand control dedicated branch circuit 9b are connected together.
It is controlled by -1.

According to the operation of each of the above means, it is possible to eliminate the need for wiring for controlling each unloaded load. Next, according to the equations 1 and 2 based on the two conditions of the controllable load capacity setting means 6-7 and the controllable time setting means 6-8 and the excess demand value determined from the measurement result of the demand measuring means 6-5, The reducible demand value calculated by the reducible demand value calculating means 6-9 according to these AND conditions is displayed on the display means 6-10 and output.

[0026]

[Equation 1]

The reducible demand value calculating means 6-9
May be configured to output the reducible demand value calculated by this as printout data for the printer.

According to the operation of each of the above means, it is possible to find a demand value that can be easily reduced by setting the conditions before performing the load control, and it is possible to expect an operational effect.

Further, as shown in FIG. 3, the controllable load capacity setting means 6-7 is composed of first, second and third control circuit setting means 6-7-1 to 6-7-3. Then, the controllable time setting means 6-8 is constituted by the first, second, and third control circuit setting means 6-8-1 to 6-8-3, and the first, second, and third control circuit setting means 6-8, respectively. By enabling setting for each of the three control circuits, it is possible to further set data that enables fine and fine load control.

[0030]

As described above, according to the present invention, the load factor control and load control of a plurality of power transformers can be centrally managed by one power management meter.

Therefore, the control condition can be obtained with the simplest configuration. As a result, it is possible to provide a highly reliable and economically superior power management meter, and
Since the load to be controlled is also concentrated in the specific load branch circuit in the power receiving equipment, it is easy to ensure reliability by selecting a load that is not affected by the momentary power loss due to switching, and the control circuit is limited. As a result, the equipment configuration required for control and the wiring work can be simplified, and also in this respect, the economic effect can be greatly improved.

Further, the function of each means for demand control provided in the power management meter can measure and display various electric power amounts and also perform demand control together with load factor control by one device. it can.

Therefore, the optimum operation of the power receiving equipment can be enabled, and further, for the demand control,
Since the controllable load is concentrated in the specific load branch circuit in the power receiving equipment, it is possible to eliminate the need for control wiring for each end load for demand control, greatly simplifying the installation work of equipment for demand control, It is possible to suppress the cost increase during installation work and reduce the economic burden.

Further, the demand value that can be reduced can be known from the controllable load capacity and the controllable time of the load. Therefore, effective demand management by load control can be performed, and further control of the controllable load capacity and the controllable time of the load for each control circuit facilitates finer control. be able to.

[Brief description of drawings]

FIG. 1 is a single connection diagram showing a configuration of high-voltage power receiving equipment according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a power management meter of the embodiment.

FIG. 3 is a configuration diagram of a main part of the power management meter of the embodiment.

FIG. 4 is a single connection diagram showing a configuration of a conventional high voltage power receiving facility.

FIG. 5 is a configuration diagram of a power management meter of the conventional example.

[Explanation of symbols]

5-1 Demand control switch 5-2, 5-3, 5-4 Load factor control load changeover switch 6-3 Load factor judgment means 6-4 Load factor changeover control output means 6-5 Demand measurement means 6-6 Demand load Control output means 6-7 Controllable load capacity setting means 6-8 Controllable time setting means 6-9 Reducible demand value calculation means 11 Load factor control load 12 Demand control load 1a High voltage power receiving equipment 6a Power management meter 9a Load Dedicated branch circuit for rate control 9b Dedicated branch circuit for demand control

Claims (4)

[Claims] 1. In a high-voltage power receiving facility including a power management meter that manages various quantities related to electric power measured from a voltage value and a current value in high-voltage power reception, the power management meter is based on the various quantities related to the electric power, An electric power transformer load factor calculating means for obtaining a load factor of the electric power transformer based on the load factor control; a load factor determining means for determining the load factor of the power transformer and outputting a load switching command according to the determination result; Based on the switching command, a load factor switching control output means for outputting switching information for load factor control load capable of connection switching is provided, and based on the switching information output from the load factor switching control output means, High-voltage power receiving equipment provided with a means for switching the load factor control loads integrated in a dedicated load factor control branch circuit by a load factor control load changeover switch. 2. In a high-voltage power receiving facility including a power management meter that manages various quantities related to electric power measured from voltage values and current values in high-voltage power reception, the power management meter is based on the various quantities related to the electric power, Demand measurement means for obtaining a demand value for demand control and outputting a load control command according to the demand value; and, based on the load control command, outputting control information for a demand control load capable of demand control. Demand load control output means is provided, based on the control information output from the demand load control output means, means for controlling the demand control load aggregated in the demand control dedicated branch circuit by a demand control switch. High-voltage power receiving equipment equipped. 3. A setting means for setting a load capacity capable of demand control and a time capable of demand control in a power management meter, and a reducible demand value for calculating a reducible demand value that can be reduced by demand control. The high-voltage power receiving equipment according to claim 2, further comprising: a calculation unit and a display unit that displays the reducible demand value. 4. The high voltage power receiving equipment according to claim 3, wherein the setting means is provided for each of the plurality of demand control loads.