KR20170017022A - Method for controlling electric power system - Google Patents

Abstract

The present invention relates to a method for controlling an electric power system, which runs a diesel generator in an island area to supply electricity. The method of controlling the electric power system comprises: a step in which a hybrid power conversion apparatus for transmitting power to an electric grid transmits an operation state of a renewable energy source generator and a remaining amount of a power storage apparatus to a power management apparatus; a power operation state monitoring step in which the power management apparatus, which manages a power generation amount and power supply according to power demand, monitors in real time a power generation amount of the diesel generator, an operation state of the renewable energy source generator, and the remaining amount of the power storage apparatus; a step in which the power management apparatus calculates a charge time to reach a preset charge target by predicting a predicted power generation amount of the renewable energy source generator; a charge target-per-hour calculation step in which the power management apparatus calculates a charge target per hour to be stored in the power storage apparatus, using the power generation amount of the diesel generator, the predicted power generation amount of the renewable energy source generator, and the charge time; a step in which the power management apparatus transmits the charge target per hour to the hybrid power conversion apparatus which is in charge of power transmission from the electric grid to a power station; and a charge execution step in which the hybrid power conversion apparatus executes charging of the power storage apparatus, using one from among generated power of the renewable energy source generator and generated power of the diesel generator, until the charge target per hour is reached.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a power system control method, and more particularly, to a power system control method of operating a diesel generator and supplying power to a book area.

1 is a view showing a power supply path for supplying generated power of a diesel generator to a home.

In some islands where grid-linking is difficult, power is produced and used independently from diesel generators.

In the case of diesel generators in the island area, rather than operating one high-capacity diesel generator, two or more low-capacity diesel generators are connected in parallel and distributed. For example, in case of a load exceeding the capacity of one low-capacity diesel generator, the second diesel generator operates and controls the load.

To this end, the power management system 10 (PMS) monitors the power supply of the stand-alone diesel generator and the power demand of the power transmission terminal, and instructs the power conversion system 20 (PCS; Power Conditioning System) To improve the transmission and distribution effect through reserve recovery, frequency control, power quality and reliability improvement, renewable energy management, energy management, and voltage management.

However, since the conventional power management apparatus 10 (PMS) is required to operate the diesel generator even in the middle of the night when power consumption is low, energy efficiency is low. Therefore, there is a need for a means for enhancing energy efficiency.

Korean Patent No. 10-1316550

The technical problem of the present invention relates to a power system control method capable of efficiently supplying power. Further, the technical problem of the present invention is to enable stable power transmission of the power conversion apparatus.

The embodiment of the present invention is characterized in that a hybrid power conversion apparatus for power transmission to a power network includes a process of transmitting a running state of a renewable energy source generator and a remaining amount of a power storage device to the power management apparatus; A power management device that manages the power supply according to the power generation amount and the electric power demand of the power transmission line is a power management state monitoring process that monitors in real time the power generation amount of the diesel generator, the operation state of the renewable energy source generator, ; Calculating the amount of charge time for predicting the predicted power generation amount of the renewable energy source generator on the same day to reach a preset target value of the charge; Wherein the power management apparatus calculates a target charging target value for each hour to be stored in the power storage device using the power generation amount of the diesel generator, the predicted power generation amount of the renewable energy source on the same day, and the charging time amount; Transmitting the target charging target value to the hybrid power converter in charge of transmission to a transmission terminal in a power grid; And charging the power storage device until the hybrid power converter reaches the charging target value for each hour by using at least one of the generated power of the renewable energy source generator and the generated power of the diesel generator Process.

Wherein the renewable energy source generator includes a wind power generator and a solar power generator, wherein B is a capacity of a power storage device [Kwh], R ₂ is an average power consumption [Kw] t ₂ [hour] is the maximum possible time at which the power converter can transmit power to the transmission line using only the power charged to the power storage device. B [Kwh] = R ₂ × t ₂ × 1.3 And a power storage device having a capacity determined by the power storage device.

에 의해 충전 시간량(t₁)이 산출됨을 특징으로 할 수 있다.In the calculation of the charging time amount, B is the capacity of the power storage device [Kwh], Wp is the predicted power generation amount on the day of the wind power generator [Kw], Sp is the predicted power generation amount on the day of the solar power generator [Kw] And a power fluctuation amount [Kw] for reaching a target value,

That the charge amount of time (t ₁₎ is calculated from may be characterized.

The calculating the hourly charging target value, W is a per generation capacity [Kw] of the wind turbine, S is per generation capacity of the solar generator [Kw], C are hourly forecast change power of the power storage device [Kw], R ₂ The average power consumption [Kw] in the night time zone of the book area, t ₂ [hour] is the maximum possible time that the power conversion device can make transmission to the power transmission end using only the power charged in the power storage device, t ₁ is the charge time amount,

The charging target value A per hour is calculated by the following equation (1).

The charging operation may control the power generation amount of the diesel generator to increase when the power generation amount of the renewable energy source generator falls below a reference value during the charging of the power storage device.

(D) of the power generation of the diesel generator is controlled so as to increase the power generation amount of the diesel generator, W is the power generation capacity per hour [Kw] of the wind power generator, S is the power generation capacity [Kw ], C is the predicted fluctuation power [Kw] per hour of the power storage device, and R ₁ is the weekday power demand [Kw]

(D) of the electric power generation of the diesel generator is calculated.

The power management apparatus according to claim 1, wherein the power management apparatus stops the charging of the power storage device when the charging of the power storage device is completed or the charging target value is reached to the charging target time, Transmitting to the conversion device; Wherein the hybrid power conversion device stops charging the power storage device upon receiving the transmission message and transmits power to the transmission terminal using only the electric power charged in the power storage device; The hybrid power converter periodically grasping charged power of the power storage device and transmitting a discharge warning message to the power management device when the power is charged to less than 30%; Controlling the generation of electric power of the diesel generator when the electric power management apparatus receives the discharge warning message and transmitting the diesel generator electric power production message to the hybrid electric power conversion apparatus; And a step in which, when the hybrid power converter receives the diesel generator power production message, transmission to the transmission terminal is performed using only the generated power of the diesel generator.

According to the embodiment of the present invention, when the hybrid electric power conversion apparatus is operated alone without operating the diesel generator during the nighttime, it is possible to reduce the fuel consumption and improve the stability of the diesel generator.

1 is a view showing a power supply path for supplying generated power of a diesel generator to a home.
2 is a configuration diagram showing a power system control system according to an embodiment of the present invention;
3 is a flowchart illustrating a power system control process according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a process of predicting a day-to-day power production amount of a wind turbine according to an embodiment of the present invention.
5 is a flowchart illustrating a process of predicting a predicted power generation amount of a solar generator on the same day according to an embodiment of the present invention.
6 is a flowchart illustrating a power transmission process using a power storage device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to explain the present invention in detail so that those skilled in the art can easily carry out the present invention. . Other objects, features, and operational advantages of the present invention, including its effects and advantages, will become more apparent from the description of the preferred embodiments. It should be noted that the same reference numerals are used to denote the same or similar components in the drawings.

2 is a configuration diagram illustrating a power system control system according to an embodiment of the present invention.

A diesel generator is a generator that generates electricity by performing diesel power generation, and generates electric power using a diesel engine as a prime mover.

The renewable energy source generator (400) is a power generation plant that generates electricity using natural environment instead of raw materials such as diesel. For example, the renewable energy source generator 400 may be a wind power generator or a solar generator.

The power storage device 300 is a power storage device capable of charging and discharging electric power to charge the electric power and provide electric power through the transmission terminal at midnight.

The hybrid power conditioning system (HPCS) capable of the independent operation of the present invention can operate the hybrid power conversion system 200 without operating the diesel generator at the time of the nighttime when the power consumption is low in addition to the conventional power conditioning system (PCS) (HPCS) can be operated independently and the power storage device 300 can be efficiently stored and consumed in accordance with the power management system (PMS) operation. Therefore, the hybrid power converter (HPCS) provides unstable renewable power to the grid in a stable manner. The hybrid power conversion apparatus 200 transmits the operation state of the renewable energy source generator 400 and the remaining amount of the power storage apparatus 300 to the power management apparatus 100, The electric power storage device 300 is charged until the target charging target value is reached by using at least one of electric power and generated electric power of the diesel generator. In detail, the hybrid power converter 200 (HPCS) basically has the functions such as improving the power quality due to power fluctuation of a commercial power conditioning system (PCS) basically, and therefore, detailed description thereof will be omitted. In the hybrid power converter 200 (HPCS), an input terminal is connected in parallel to a wind power generator and a photovoltaic generator to receive power and store power in the power storage device 300.

The output stage of the hybrid power converter 200 (HPCS) has a bidirectional structure. When the power fluctuation of the independent diesel generator occurs as in the conventional power conditioning system (PCS) function, The power storage device 300 may store the surplus power generated during operation of the power generator 300 considering the power generation efficiency of the power storage device 300 or the power generation efficiency of the independent diesel generator.

Since the hybrid power conversion unit (HPCS) is completely separated from the wind power generator and the solar power generator and the power transmission unit, it is possible to prevent a power transmission accident that may occur due to the abnormal power generated by the wind power generator and the solar power generator have.

A weather tower of about 30M in height is installed to operate the hybrid power converter 200 (HPCS), and is composed of an air speed sensor, a wind direction sensor, a temperature sensor, a humidity sensor, an air pressure sensor, a radiation amount sensor and a rainfall sensor . All the sensors installed in the meteorological tower are measured and converted into signals, converted into data, collected and stored in separate data, and data is transmitted to the power management apparatus 100 (PMS) in real time.

In addition, the hybrid power converter 200 (HPCS) receives electric power from the transmission terminal and supplies electric power to the hybrid electric power conversion device 200 (HPCS) according to a command from the power management device 100 (PMS) during normal operation. The power management device 100 (PMS) always estimates the output capacity of the diesel generator currently in operation.

The hybrid power converter 200 (HPCS) checks the current operating state of the wind turbine, the sun and the generator, and the remaining capacity of the power storage device according to the command of the power management device 100 (PMS) PMS). In addition, the hybrid power converter 200 (HPCS) receives electric power from the transmission terminal and supplies electric power to the hybrid power converter 200 (HPCS) in accordance with the command of the power management device 100 (PMS) during normal operation. The power management device 100 (PMS) always estimates the output capacity of the diesel generator currently in operation.

The hybrid power converter 200 (HPCS) checks the current operating state of the wind turbine, the sun and the generator, and the remaining capacity of the power storage device according to the command of the power management device 100 (PMS) PMS).

The power management system 100 includes a power management system 100 for monitoring the power generation amount of the diesel generator, the running state of the renewable energy source generator 400, and the remaining amount of the power storage device 300 in real time, do. The power management apparatus 100 (PMS) calculates the amount of charge time for predicting the predicted power generation amount of the renewable energy source generator 400 on the same day to reach a preset charge target value, and calculates a power generation amount of the diesel generator, The charge target value for each hour to be stored in the power storage device 300 is calculated using the predicted power generation amount and the charge time amount of the energy source generator 400 on the same day. Then, the power management apparatus 100 transmits the charging target value per hour to the hybrid power conversion apparatus 200 that is responsible for transmission to the power transmission end in the power network.

Described below in detail, the power management apparatus 100 (PMS) holds a large amount of power consumption data of the book area over time. The power management device 100 (PMS) has data on power generation and oil consumption reference rate of each stand-alone diesel generator. The power management device 100 (PMS) stores real-time power generation and cumulative power generation of the wind turbine and the solar generator. The power management apparatus 100 (PMS) issues a command to the transmission terminal to constantly estimate the current load capacity increase and decrease.

The power management device 100 (PMS) always estimates the output capacity of the diesel generator currently in operation. The power management apparatus 100 (PMS) must have reliable data of the meteorological station installed at the place of installation for predicting the generation amount of the wind power generator, data of 10 years or more, or data obtained from actual measurement by installing the meteorological tower, It is necessary to be able to extract only the data of ± 3 months moving. The extracted ± 3 month data and the current wind speed data measured by the current wind speed sensor are compared with the stored data at intervals of 10 minutes, Find the pattern cycle with the most similarity to the data, predict the average wind speed on that day, and substitute it with the output capacity of the wind power generator to predict the generation amount on that day.

In order for the power management device 100 (PMS) to predict the power generation of the photovoltaic generator, it should have the sunrise and sunset data provided by the reliable astronomical knowledge information of the installation site, Data on the day and current wind speed, temperature, humidity, and temperature data are input from the meteorological tower measured in the current real-time to predict the day's sunshine amount, and the average solar radiation amount is predicted by substituting the currently measured solar radiation amount data. do.

The power management apparatus 100 (PMS) estimates the charge target for each hour in the predicted power storage and stores the power in the power storage device 300. [ The power management apparatus 100 (PMS) instructs the diesel generator to increase the output of the diesel generator when the power generation of the wind turbine and the photovoltaic generator is not reduced or generated during the power saving process in the power storage device 300 As shown in FIG.

When the power management apparatus 100 (PMS) reaches the target value over time during the power storage process in the power storage apparatus 300 or when the power of the power storage apparatus 300 is fully charged, the hybrid power conversion apparatus 200 (HPCS) to increase power efficiency of diesel generators by helping to conserve electricity in the island.

The power management apparatus 100 (PMS) issues a command to the diesel generator when it is in the middle of the night, and operates the hybrid power converter 200 (HPCS) to issue the command to the diesel generator 200 alone. When the power amount of the power storage device 300 is reduced to less than 30%, the hybrid power converter 200 (HPCS) delivers a warning message to the power management device 100 (PMS). The power management apparatus 100 (PMS) confirms the warning message and issues a diesel generator command to start the diesel generator. The system operator can confirm whether the system operation plan transmitted from the power management apparatus 100 (PMS) is transmitted and to grant or cancel the operation command. The system operator can grant the power management apparatus 100 (PMS) cancel and emergency stop during operation of the hybrid power converter 200 (HPCS). The power management apparatus 100 (PMS) can grant all data transfer and all control authority when there is a KEPCO integrated operating system that manages the book area, so that the existing stand-alone diesel generator manager can be integrated and operated without any administrator Management is possible. For reference, the data transmission, command, and control signal between the power management apparatus 100 (PMS) and the KEPCO integrated operating system can be transmitted and received securely to the optical cable.

FIG. 3 is a flowchart illustrating a power system control process according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating a process of predicting a day-to-day power production amount of a wind turbine according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating a power transmission process using a power storage device according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating a process of predicting the predicted power generation amount of a solar power generator on the same day according to an embodiment of the present invention.

The hybrid power converter 200 (HPCS) that is responsible for power transmission to the power network transmits the operation state of the renewable energy source generator 400 and the remaining amount of the power storage device 300 to the power management device 100 (S310). The renewable energy source generator 400 may include a wind power generator and a solar generator. Accordingly, the hybrid power converter 200 (HPCS) transmits the operation state of the wind power generator and the operation state of the solar generator to the power management apparatus 100 (PMS). In addition, the hybrid power converter 200 (HPCS) also transmits the operating state of the diesel generator to the power management device 100 (PMS).

The total renewable energy generation capacity, which is the sum of the generation capacity of the wind turbine generator and the generation capacity of the photovoltaic generator, should be designed to be less than 30% of the input capacity input to the hybrid power converter 200 (HPCS). The hybrid power converter 200 (HPCS) for the stand-alone operation at the time of the night-time is not a diesel generator in consideration of the area where the electric power production load is difficult to produce and supply with respect to the electric power production load at the time of storing the electric power of the electric power storage device 300 In order to ensure the stability of the hybrid power converter 200 (HPCS) by operating the wind turbine and the solar generator in parallel, the output capacity of the wind power generator and the photovoltaic generator is controlled by the hybrid power converter 200 It is very important to estimate the load capacity to be less than 30% of the input capacity, and the capacity calculation is as shown in the following equation (1).

Where W is the generating capacity of the wind power generator, S is the generating capacity of the solar generator, and P is the allowable capacity of the hybrid power converter 200 (HPCS).

On the other hand, the power management apparatus 100 (PMS) that manages the power supply according to the electric power production amount and the power demand amount of the power transmission terminal determines the power generation amount of the diesel generator, the operation state of the renewable energy source generator 400, (S320) for monitoring the remaining amount of the electric power supplied from the electric power source (300) in real time. The operation state of the wind power generator, the operation state of the solar generator, the operation state of the diesel generator, and the remaining amount of the electric power storage device 300 from the hybrid power inverter 200 (HPCS) and monitors the received data in real time.

The power management apparatus 100 (PMS) has a step of calculating a charging time amount for predicting the predicted power generation amount of the renewable energy source generator 400 on the same day to reach a preset charging target value (S330). 4 shows a process of predicting the predicted output of the wind power generator on the same day as that of the renewable energy source generator 400. In order to predict the power generation amount of the wind power generator 100, the power management apparatus 100 (PMS) Meteorological Agency Data should be stored for more than 10 years or data obtained through actual installation by installing a weather tower and it should be possible to extract only data of ± 3 months moving based on the current date. The present wind speed sensor compares the measured wind speed data of the current area with the stored data at intervals of 10 minutes, finds the pattern period having the highest likelihood of the current wind speed data, predicts the average wind speed range on that day, Output capacity and substitution are used to predict the amount of production on that day (the predicted output of the day).

In the above equation (2), W _p is reliable wind speed data over 10 years, W _m is the wind speed data range within ± 3 months based on the current date, W _d is the currently measured wind speed data, W _p Means the predicted power generation of the wind power generator.

5, the power management apparatus 100 (PMS) estimates the power generation amount of the photovoltaic generator corresponding to the renewable energy source power generator 400, You should have sunrise and sunset data provided by reliable astronomical space information of the place, and assign the wind speed, temperature, humidity and temperature data on the same day sunrise and sunset data and the current real-time weather tower Predicts the amount of sunshine on that day, substitutes it with the currently measured solar radiation data, predicts the average solar radiation, and assigns it to the solar and power generation capacity.

In order to estimate the power generation of the solar power generator, the sunrise and sunset timetable data provided by the Korea Astronomy and Space Science Institute and a large amount of existing meteorological data of the solar power generator installation are extracted based on the current date and compared with the currently measured solar radiation amount, .

Where S _s is the day-to-day sunrise, S _c is the day-to-day meteorological data of the PV plant, S _d is the currently measured solar radiation data, and S _p is the predicted solar power generation.

On the other hand, after predicting the predicted power generation amount of the renewable energy source generator 400 on the same day, the amount of charging time required to reach the preset charging target value is calculated. In this case, the capacity of the power storage device 300 to be. The hybrid power converter 200 (HPCS) is operated solely in the middle of the night when the power consumption is low and the diesel generator is not operated. In order to supply electric power to the island area, the capacity of the power storage device 300 is very important. It must be able to have an additional capacity of 30% or more for the safe power supply of the device 300 and for the protection of the power storage device 300.

B is the capacity of the power storage device 300 [Kwh], R ₂ is the average power consumption in the night time zone of the book area [ Kw], t ₂ [hour] is a power conversion when the device is to be referred to as a by using only power up time that can be to occur the power transmission of the power transmission stage charging a power storage device (300), B [Kwh] = R _A power storage device 300 having a capacity or more determined by ₂ x t ₂ x 1.3 should be used.

The amount of charging time is the amount of time that charging can be performed in the power storage device 300, B is the capacity [Kwh] of the power storage device 300, Wp is the predicted power generation amount [Kw] day predicted power output of the solar generator [Kw], Cp can be calculated by a time referred to the power fluctuation amount [Kw] for charging the target value is reached, the filling amount of time (t ₁₎ is expression (4) below.

On the other hand, after the calculation of the charging time amount (S330), the power management apparatus 100 uses the power generation amount of the diesel generator, the predicted power generation amount of the renewable energy source generator 400 on that day, And a time-based charge target value calculation process (S340) for calculating the charge target value per hour to be stored in the power storage device (300).

S is the generation capacity per hour [Kw] of the photovoltaic generator, C is the predicted fluctuation power [Kw] per hour of the power storage device 300, R ₂ is the average power consumption [Kw] in the night time zone of the book area, t ₂ [hour] is the average power consumption of the power storage device 300 that can be transmitted to the power transmission terminal using only the power stored in the power storage device 300 the maximum possible time, t is _1, can be calculated by [equation 5] below when referred to the amount of charging time.

After the charging target value calculation process S340, the power management apparatus 100 transmits the charging target value per hour to the hybrid power conversion device 200 responsible for transmission to the power transmission side in the power network (S350). The hybrid electric power conversion apparatus 200 uses the electric power generated by the renewable energy source generator 400 and the electric power generated by the diesel generator 300 until the hybrid electric power conversion apparatus 200 reaches the charge target value per hour, (S360).

The charging execution process S360 controls the diesel generator to increase the power generation amount when the power generation amount of the renewable energy source generator 400 falls below a reference value during the charging of the power storage device 300. [ In this case, controlling to increase the power generation amount of the diesel generator controls the fluctuation amount (D) of the power generation of the diesel generator, W is the power generation capacity per hour of the wind power generator [Kw], S is the power generation capacity per hour Kw], C is the predicted fluctuation power [Kw] per hour of the power storage device 300, and R ₁ is the weekday power demand [Kw] in the book area. The amount of variation D can be calculated.

If wind power generators and photovoltaic power generation are low, it is difficult to reach the target value every hour, the additional power supply is provided from the diesel generator power. On the other hand, when the power generation of the wind power generator and the photovoltaic power generation is high, .

The power generation amount K of the diesel generator for efficiently operating the diesel generator for controlling the variable power in advance by the hybrid power converter 200 (HPCS) in advance is expressed by Equation (7).

In Equation (7), A represents a charge target value per hour, Wp represents a predicted power generation amount of the wind power generator on the same day [Kw], and Sp represents a predicted power generation amount of the solar power generator on the same day [Kw].

Meanwhile, after the above-described charging process (S360), the power stored in the power storage device 300 is supplied to each household through the power transmission terminal. To this end, the power management apparatus 100 (PMS), as shown in FIG. 6, charges the power storage device 300 when the charging of the power storage device 300 is fully charged or the charging target time is reached And transmitting the transmission message to the hybrid power converter 200 (HPCS) to stop transmission and perform power transmission (S370). Upon receiving the transmission message, the hybrid power converter 200 (HPCS) stops charging the power storage device 300 and transmits power to the transmission terminal using only the electric power charged in the power storage device 300 (S372).

The hybrid power converter 200 (HPCS) periodically grasps the charged power of the power storage device 300 and sends a discharge warning message to the power management device 100 (PMS) when it is charged to less than 30% (S374). In the step S376, when the power management apparatus 100 receives the discharge warning message, it controls the power generation of the diesel generator, and transmits the diesel generator power production message to the hybrid power converter 200 (HPCS) . When the hybrid power converter 200 (HPCS) receives the diesel generator power production message, transmission to the power transmission end is performed using only the generated power of the diesel generator (S378).

Therefore, the load pattern in most of the island areas is similar. For example, the selected island is the island. The average load in this island is 124 kW, the maximum load is 305 kW, and the minimum load is 80 kW. Also, if the power consumption of the hybrid power converter 200 is operated without operating the diesel generator at a time when the power consumption is drastically decreased from after 19:00 to before 04:00 in the time zone, fuel efficiency and stability of the diesel generator are improved .

For example, there are two 500kW stand - alone diesel generators that supply power to the island area, and that there are over 600kW of load on the area at all times. Two diesel generators will operate and one will operate at 100% and operate at 25%.

When calculating the fuel consumption by operating the diesel generator, it is 155.2 l / 500 kW = 0.31 l at 100% operation, 116.2 l / 375 kW = 0.31 l at 75% operation and 185.5 l / % Operating: 155.6 l / 125 kW = 0.45 l.

As a result of 100% operation, oil consumption is the same during 75% operation, oil consumption is 0.03ℓ during 50% operation and 0.14ℓ during 25% power generation. It is very important to operate diesel generators as close to 100% as possible, and it is very important to utilize the surplus power generated.

The embodiments of the present invention described above are selected and presented in order to facilitate the understanding of those skilled in the art from a variety of possible examples. The technical idea of the present invention is not necessarily limited to or limited to these embodiments Various changes, modifications, and other equivalent embodiments are possible without departing from the spirit of the present invention.

100: power management device
200: Hybrid power converter
300: Power storage device
400; Renewable energy source generator

Claims (7)

A hybrid power conversion apparatus for power transmission to a power network, the method comprising: transmitting a running state of a renewable energy source generator and a remaining amount of a power storage device to the power management apparatus;
A power management device that manages the power supply according to the power generation amount and the electric power demand of the power transmission line is a power management state monitoring process that monitors in real time the power generation amount of the diesel generator, the operation state of the renewable energy source generator, ;
Calculating the amount of charge time for predicting the predicted power generation amount of the renewable energy source generator on the same day to reach a preset target value of the charge;
Wherein the power management apparatus calculates a target charging target value for each hour to be stored in the power storage device using the power generation amount of the diesel generator, the predicted power generation amount of the renewable energy source on the same day, and the charging time amount;
Transmitting the target charging target value to the hybrid power converter in charge of transmission to a transmission terminal in a power grid; And
Wherein the hybrid power converter performs a charging operation to charge the power storage device until the charging target value reaches the charging target value by time using at least one of the generated power of the renewable energy source generator and the generated power of the diesel generator, ;
≪ / RTI >
The method according to claim 1,
Wherein the renewable energy source generator includes a wind power generator and a solar generator,
In the power storage device, B is the capacity of the power storage device [Kwh], R ₂ is the average power consumption [Kw] in the night time zone of the book area, t ₂ [ Is a power storage device having a capacity determined by B [Kwh] = R ₂ x t ₂ x 1.3, where x is the maximum possible time at which power can be transmitted to the power transmission terminal .
The method according to claim 2, wherein calculating the amount of charge time comprises:
B is the capacity of the power storage device [Kwh], Wp is the predicted output of the wind turbine on the day [Kw], Sp is the predicted output of the solar generator on the same day [Kw], Cp is the power variation [Kw] In other words,

A power system control method, characterized in that the calculated filling amount of time (t ₁₎ by.
4. The method of claim 3, wherein calculating the hourly charging target value comprises:
W is the power generation capacity per hour of the wind power generator [Kw], S is the generation capacity per hour of the photovoltaic generator [Kw], C is the predicted fluctuation power per hour of the power storage device [Kw], R ₂ is the average consumption The electric power [Kw] and t ₂ [hour] are the maximum possible time that the power conversion apparatus can transmit power to the transmission terminal using only the electric power charged in the electric power storage device, and t ₁ is the charging time amount,

To calculate a charge target value (A) by time.
The method according to claim 4,
And controlling the power generation amount of the diesel generator to increase when the power generation amount of the renewable energy source generator falls below a reference value during the charging of the power storage device.
The method of claim 5, wherein controlling the diesel generator to increase the power output comprises controlling a variation (D) of power production of the diesel generator,
W is the hourly power generation capacity [Kw] of the wind power generator, S is the power generation capacity per hour of the photovoltaic generator [Kw], C is the predicted fluctuation power [Kw] per hour of the power storage device, R ₁ is the weekday power demand [Kw ],

(D) of the power generation of the diesel generator is calculated by the following equation (1).
The method of claim 1, further comprising:
Transmitting the power transmission message to the hybrid power conversion apparatus to stop charging of the power storage device and perform transmission when the charging of the power storage device is fully charged or the charging target value is reached at the time;
Wherein the hybrid power conversion device stops charging the power storage device upon receiving the transmission message and transmits power to the transmission terminal using only the electric power charged in the power storage device;
The hybrid power converter periodically grasping charged power of the power storage device and transmitting a discharge warning message to the power management device when the power is charged to less than 30%;
Controlling the generation of electric power of the diesel generator when the electric power management apparatus receives the discharge warning message and transmitting the diesel generator electric power production message to the hybrid electric power conversion apparatus; And
The hybrid electric power conversion apparatus comprising: a step of transmitting power to a power transmission terminal using only the generated electric power of the diesel generator when the diesel generator power production message is received;
≪ / RTI >

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