KR101366156B1 - Measuring and billing system for summation watt(watt-hour) - Google Patents

Abstract

The present invention relates to a summation watt measuring and billing system for electricity transaction which is invented for suppressing increase of a maximum peak load of an electricity using customer and for saving electricity billing and for efficient management of electricity usage. The summation watt measuring and billing system can improve an electric fee charging scheme of a Korean electric power corporation (KEPCO) and maintenance and repair management work about the existing summation metering device remarkably. A metering system server can measure and record a summation peak in the same time zone by using metering data which is remotely communicated from the KEPCO as to a KEPCO watt-hour meter. Basic fee of the power using customer can be reduced by imposing the electric fee accordingly. And various metering information can be provided in real-time through a communication network between the KEPCO and the electricity using customer.

Description

Synthesis and Billing System for Summation Watt (Watt-Hour)}

The present invention has been invented to improve the current electricity tariff system of the Korea Electric Power Corporation to suppress the increase of the maximum peak load of power customers, to save electricity bills, to improve the charge management work, and to efficiently manage power usage. Do not install the existing synthetic electricity meter installed on the customer's side of electricity use, but instead, read the KEPCO electricity meter installed at the customer's site in KEPCO and utilize the remote meter reading data in real time in the synthetic electricity metering system for electricity transactions. It is constructed by receiving input and performing summing function.

The current electricity tariff system for KEPCO's electric power customers consists of "Basic rate (peak rate / power rate) + power usage (use power) rate + power factor rate".

The base rate is a method of adding a base rate to the maximum peak load among the 15-minute demand loads in order to reduce the maximum load and facilitate smooth supply and demand.

The current electricity meter reading for KEPCO's electricity transactions shows that each power receiving line (power use) is used when a customer who receives power receives two or more lines (22.9kV / 154kV / 345kV) from KEPCO's power system. Electricity meter for electricity transaction of 3 types of tariff system is installed for each power line, and the power consumption and power of each electricity transaction meter are separately read by KEPCO.

In addition, KEPCO will send a bill for electricity usage bills once a month. The bills of the Korea Electric Power Corporation, which are sent out at this time, apply the used power and the maximum peak power read from the electricity meter for each electricity transaction.

Therefore, in the conventional method, it is not possible to measure the sum of peaks at the same time.

The present invention was developed to improve the absurdity of the method.

According to the present invention, by installing and using a synthetic power (quantity) metering system in Korea Electric Power Corporation, it is possible to measure and record not only the sum peak of the same time but also the sum of the sum of electric power, and accordingly, the electric charge is automatically added, It is designed to dramatically improve the investment cost, maintenance and maintenance work according to the conventional synthetic weighing device installation of the conventional and to reduce the base charge on the customer's power usage.

Thus, the present invention can measure the synthesized peak of the same time period without using the existing composite electricity meter on the side of the customer using the power, and the active power amount by current time zone, reactive power amount by current time zone, effective power amount by month and month, and previous month As the amount of reactive power by time, maximum power by current month, maximum power by previous month, and demand power for 15 minutes can be precisely metered, it is possible to save the investment cost of installing a composite power meter separately from the customers who use the power as before. It also has the effect of reducing the basic electricity bill.

In addition, KEPCO, a public corporation, can form a management and operation system that can prevent illegal acts (methods) in advance, such as the challenge of reducing electricity bills at electric power usage sites. Will automatically switch to a reasonable and reasonable power billing system to provide better power delivery services to customers who use electricity.

The present invention does not install a conventional electricity meter installed on-site in the conventional way on the electric power customer side, instead, remotely reads the KEPCO electricity meter installed on the electric power customer site in KEPCO, and uses this metering data to trade electricity. It is to establish a separate synthetic power (metering) metering system. This is done by systematically implementing the function of the synthesized electricity meter to be installed at the site of the customer using the power.

The conventional synthetic weighing device is configured to install a synthetic weighing device separately from the KEPCO electricity meter at the customer site of the power use as shown in the following figure. (See Table 1 below)

Therefore, the weighing principle of the existing synthetic weighing device is the pulse count summation method, which counts the output pulse signal of the KEPCO electricity meter in the synthetic weighing device and adds it in real time, and is widely used in general industrial sites. As a similar principle of operation, it can be regarded that the metering item for electric power trading of KEPCO is implemented in the synthesis system.

In other words, the metering pulses output from the KEPCO electricity meters are input in real time from the synthesis weighing device and accumulated in 15 minute increments in the CPU of the synthesis weighing device, and these values are stored in the non-volatile memory of the weighing device every 15 minutes. do.

In addition, the highest 15 minute demand strategy value among the 15 minute power consumption (kW) value is displayed as the peak demand of the current month. Based on this value, KEPCO uses the base rate (peak rate) of the electricity rate. Will be added to the customer side.

The weighing algorithm of the conventional synthetic weighing device and the conceptual diagram of the conventional synthetic weighing device are as follows.

On the other hand, the synthetic power (quantity) metering system for power transactions of the present invention is a technology that implements the function of the synthetic weighing device in a computer server by utilizing the metering data remotely read the KEPCO meter installed in the field in the Korea Electric Power Corporation The conceptual diagram is as follows,

As shown in the figure above, the KEPCO meters installed at T / L #A and #B of the customer who used the power and the wireless modem are used to remotely read the metering data of the KEPCO meters at the Korea Electric Power Corporation through the CDMA communication network. The data are inputted in real time from the electric power metering system for power transaction, and the sum function is performed. The algorithm is as follows.

Therefore, the present invention is a synthetic power metering system for power transactions.

1) Individual meter reading

-Display of meter reading of active power / reactive power (kW / kVAR) and active power / reactive power (kWh / kVARh)

-Can also be displayed as the primary value with MOF magnification input and MOF magnification applied

-Display meter reading by season / day / time zone

-Display information of various electricity quantities (voltage, current, frequency, power factor, etc.) that can be provided in individual electricity meters

Data memory storage function (self-measured items database)

2) Sum calculation and meter reading function

-Calculated meter reading function for total active power / total reactive power (kW / kVAR) and total effective power / total reactive power (kWh / kVARh)

-MOF magnification input and operation summation function to the primary value to which MOF magnification is applied

-Metering and metering function by season / day / time zone of aggregated weighing data

Data memory storage function (self-measured items database)

-Calculation function for various electricity quantity that can be provided in individual electricity meter

-Provide meter reading information through on-line communication network to customers who use electricity

3) Compared with the conventional

Existing Synthetic Weighing Device

New way
Synthetic power metering system
Remarks
install
Configuration
Installed separate weighing device with KEPCO electricity meter (Example: KEPCO A + KEPCO B + Synthesis Weigher)

Only need to install KEPCO electricity meter (ex: KEPCO A + KEPCO B)-No need to install a synthetic meter on site
Simplify installation configuration and reduce costs


meterage
function


Simple synthetic demand power (kW) measurement
1) Display of active power / reactive power (kW / kVAR) and active power / reactive power (kWh / kVARh) meter reading for each KEPCO meter

2) Calculated meter reading function for total active power / sum total reactive power (kW / kVAR) and total active power amount / sum total reactive power amount (kWh / kVARh)

variety
Meter reading and
Provide information
Save
function
15-minute interval, simple synthetic demand power storage
The data of the various weighing functions can be stored separately at 15-minute intervals, and in theory, the database can be database with unlimited capacity according to the storage capacity of the weighing system server.

Databaseized weighing data can be used for various purposes

hard
Wear
function
There is a limit on the quantity of power meters to add up (the number of DI ports that receive meter pulses must be limited in hardware)
There is no limit on the quantity of electricity meters to add
There is no limit on the quantity and distance since the meter data of the electricity meter is acquired using the communication network (CDMA, etc.)
In addition, installation is restricted when the distance between the meter and the meter and the synthesis meter is far.
There is no distance limit between power meters
soft
Wear
function
Various data information can be processed by software work in the weighing system server, and provides various weighing information through communication network to KEPCO and customers using electricity in real time

Claims (1)

The present invention does not install a synthetic power meter installed on the site of the customer of the power customer using the power usage KEPCO meter received more than two lines of power lines installed in the T / L #A, T / L # B of the customer using the power Synthetic power for power transactions constructed to perform a summing function by reading the remotely read data in real time from the KEPCO through a CDMA communication network using a wireless modem and receiving the real-time data from the synthetic electricity metering system for power transactions. Weighing system.