KR20180080037A - Parallel generation system and method for controlling the same - Google Patents

Abstract

The present invention relates to a power generation system using engines, and especially, to a parallel power generation system in which a plurality of power generation systems are connected in parallel, and a control method thereof. The parallel power generation system comprises: a plurality of power generation systems which individually include a power converting device, and are connected to each other in parallel; a connection switch which connects DC end capacitors to each other within the power converting device of a neighboring power generation system; and a control unit which controls the power converting device and the connection switch. The control unit performs a power generation control which determines whether any one of the power generation systems is failed, and if at least one power generation system is determined to be failed, turns on the connection switch connected between the failed power generation system and a neighboring power generation system and controls power generation. The purpose of the present invention is to provide a parallel power generation system and a control method thereof which efficiently cope with power failures caused in a system.

Description

[0001] Parallel generation system and method [0002]

The present invention relates to a power generation system using an engine, and more particularly, to a parallel power generation system in which a plurality of power generation systems are connected in parallel and a control method thereof.

A cogeneration system is a system that generates electricity from a generator by operating an engine with gas fuel, and converts the heat generated by the engine into hot water or the like to supply it to the customer.

In this cogeneration system, an air conditioner is connected to supply power and heat or hot water to the air conditioner.

The engine turns the generator to produce power. In addition, the electric power generated by the generator can be converted into commercial electric power converted from electric power, voltage, frequency and the like in the electric power converter and supplied to electric power consumers such as building or air conditioner.

In this way, a plurality of power generation systems can be connected in parallel so as to cover the power demand of the entire building.

However, since there is no protection device for additional power conversion devices in such parallel-connected power generation systems, protection schemes in individual power generation systems can generally be operated if a fault condition occurs.

In this single power generation system, the protection method of the DC stage is a method of burning the overcharged voltage in the DC stage with heat energy by using a break chopper.

However, if such a burned energy can not be regenerated and a failure occurs in any one of the individual power generation systems, the greater the amount of power supplied by the system, the greater the possibility of failure and damage to each part. .

Therefore, there is a need for measures to solve these problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a parallel power generation system and a control method thereof that can efficiently cope with a failure in a system in a parallel connected power generation system.

Also, the present invention provides a parallel power generation system and a control method thereof that enable power generation without loss of energy when a failure occurs in one system in a parallel connected power generation system.

According to a first aspect of the present invention, there is provided a power generation system comprising: a plurality of power generation systems each including a power conversion device and connected in parallel with each other; A connection switch for connecting the DC stage capacitors in the power converter of the neighboring power generation system to each other; And a control unit for controlling the power conversion apparatus and the connection switch, wherein the control unit determines whether at least one of the power generation systems is out of order, and if at least one of the power generation systems is determined to be out of order, It is possible to perform power generation amount control for turning on the connection switch connected between the power generation system judged to be the power generation system and the adjacent power generation system and controlling the power generation amount.

Here, the power generation amount control may reduce a power generation amount corresponding to the calculated power generation amount by calculating a power generation amount corresponding to a power increase slope of the DC step capacitor.

Here, the power generation control may determine whether a voltage other than the power generation amount flows into the DC stage capacitor, and may further reduce the power generation amount when a voltage other than the power generation amount flows.

Here, the controller may determine whether the power increase slope of the DC stage capacitor of the adjacent system exceeds the set value, and perform the power generation control when the power increase slope exceeds the set value.

At this time, the controller can maintain the power generation amount when the power increase slope is less than the set value.

Here, the plurality of power generation systems may include a master power generation system including the control unit; And at least one slave power generation system controlled by the master power generation system.

At this time, the power generation system may perform power generation amount control for turning on the connection switch connected to both sides of the DC stage capacitor of the power generation system determined as the failure and controlling the power generation amount, if any one of the slave power generation systems is determined as a failure .

According to a second aspect of the present invention, there is provided a control method for a plurality of power generation systems, each including a connection switch connected in parallel to each other and connecting DC stages of adjacent systems to each other, Determining whether at least one of the systems is malfunctioning; Turning on the connection switch connected between the power generation system determined to be faulty and the adjacent power generation system if at least one of the systems is determined to be faulty; Determining whether a power rising slope of the DC stage capacitor of the adjacent power generation system exceeds a set value; Performing power generation amount control to reduce the power generation amount when the power increase slope exceeds the set value; And maintaining the power generation amount when the power rising slope is less than a set value.

The step of performing the power generation control may include: calculating a power generation amount corresponding to a power increase slope of the DC stage capacitor; Reducing the power generation amount corresponding to the calculated power generation amount; And a step of controlling a constant voltage of the DC stage capacitor.

Determining whether a voltage other than the power generation amount flows into the DC stage capacitor, and decreasing the power generation amount when a voltage other than the power generation amount is inputted; And turning off the connection switch when a voltage other than the generated amount does not flow.

The present invention has the following effects.

When a fault occurs in one power generation system during the connection operation of the parallel connection power generation system, the inverter operation of the power generation system is stopped and the DC power capacitor may become an overvoltage state and become unstable.

However, if the DC link of the adjacent power generation system is shared in this situation, the capacity of the DC stage capacitor is combined with the total amount to increase the stability, and the power of the converter of the adjacent power generation system, The surge energy can be supplied to the receiver stage without having to be burnt to avoid waste of energy.

In addition, as the power generation system is connected to such a power generation system, it is possible to omit parts such as break chopper, IGBT element, and resistor installed in the power converter DC capacitor of each power generation system. .

1 is a conceptual diagram schematically showing an example of a cogeneration system to which the present invention can be applied.
2 is a schematic view showing an example of a state in which a plurality of power generation systems are connected in parallel.
3 is a block diagram of an individual power generation system.
4 is a block diagram illustrating a parallel power generation system according to an embodiment of the present invention.
5 is a block diagram illustrating an operation of a parallel power generation system according to an embodiment of the present invention when a failure occurs.
FIG. 6 is a flowchart illustrating an operation of a parallel power generation system according to an embodiment of the present invention when a failure occurs.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims.

It will be appreciated that when an element such as a layer, region or substrate is referred to as being present on another element "on," it may be directly on the other element or there may be an intermediate element in between .

Although the terms first, second, etc. may be used to describe various elements, components, regions, layers and / or regions, such elements, components, regions, layers and / And should not be limited by these terms.

1 is a conceptual diagram schematically showing an example of a cogeneration system to which the present invention can be applied.

The cogeneration system 100 refers to a system that generates electricity from a generator by operating an engine with gas fuel, converts heat generated by the engine into hot water or the like, and supplies the heat to the customer.

In the cogeneration system 100, an air conditioner is connected to supply power, heat, or hot water to the air conditioner.

The gaseous fuel can be supplied by the zero governor 12 while maintaining a constant outlet pressure regardless of the shape of the inlet input or the change in flow rate. The zero governor 12 is capable of obtaining a stable outlet pressure over a wide range and has a function of controlling the pressure of the gaseous fuel supplied to the engine to be almost constant at atmospheric pressure. In addition, the zero governor 12 is provided with two solenoid valves to shut off the supplied fuel.

The air can be filtered and supplied with clean air through an air cleaner 14. The air cleaner 14 can block the mixing of moisture and oil in the form of dust and mist using external air supplied to the engine as a filter.

The gas fuel and the air supplied as described above can be sucked into the engine by a mixer having a constant mixture ratio of air and fuel by a mixer (16).

A turbocharger 20 can compress the mixer to a high temperature and high pressure state. The turbocharger 20 is a device that rotates the turbine by the force of the exhaust gas, compresses the intake air by its rotational force, and sends the compressed air to the cylinder of the engine to increase the output.

The turbocharger 20 is a combination of a turbine and a supercharger. The turbocharger 20 is composed of a turbine and an air compressor connected directly to the turbine. The turbine wheel is rotated by the energy of the exhaust gas The air sucked by the air compressor can be compressed and sent to the cylinder.

The turbocharger 20 has a structure in which a turbine wheel in which a blade is installed and an impeller of an air compressor are connected to one shaft and each surrounds the housing, and can be disposed near the exhaust manifold of the engine.

The mixer is cooled by the intercooler 25 and then introduced into the engine 30 through the intake manifold 32 because the temperature of the mixture is compressed by the turbocharger 20. [ The intercooler 25 can cool the mixer to increase the density, thereby increasing the absolute amount of the mixer introduced into the engine and improving the engine output.

The intercooler 25 may be constituted by an air-cooled heat exchanger or a water-cooled heat exchange path for cooling with water. The water-cooled intercooler can use cooling water as a medium, and it has a separate heat exchanger and pump to discard the calories from the compressed mixer to the outside.

Between the intercooler 25 and the intake manifold 32, a throttle valve 38 may be provided to adjust the amount of the mixed gas flowing into the engine 30. An electronic throttle control valve (ETC valve) is generally used as the throttle valve.

Further, the engine can be controlled with various control variables related to the control of the engine through a separate engine control unit (ECU) 31. For example, the ETC valve 38 and the control period of the valve can be controlled by the ECU 31. The ECU 31 may be controlled by a control unit 110 (see FIG. 4) that controls the entire engine power generation system.

The engine 30 is an internal combustion engine that operates the mixer introduced through the intake manifold 32 through four strokes of suction, compression, explosion, and exhaust.

Exhaust gas generated as the engine 30 is operated is discharged through the exhaust manifold 34, at which time the impeller of the turbocharger 20 is rotated.

The engine 30 rotates the generator 40 to produce electric power. To this end, a belt may be connected between a pulley 36 provided at one end of the rotating shaft of the engine 30 and a pulley 46 provided at one end of the rotating shaft of the generator 40.

The pulley 36 of the engine 30 and the pulley 46 of the generator 40 may be provided so that the rotation ratio thereof is approximately 1: 3. That is, when the engine 30 makes one revolution, the generator 40 can rotate about three times.

The power generated by the generator 40 may be converted into a commercial power converted from a current, a voltage, a frequency, etc. in the power converter 90 and supplied to a power consumer such as a building or an air conditioner.

On the other hand, since the engine 30 generates considerable heat during operation by gas combustion, it circulates the cooling water and performs heat exchange to absorb the heat of high temperature generated in the engine.

In the automobile, the radiator is installed in the cooling water circulation flow path to discard all of the waste heat of the engine. In the cogeneration system 100, however, the heat generated by the engine can be absorbed to generate hot water.

To this end, a hot water heat exchanger (50) is provided in the cooling water circulation channel so that heat is exchanged between water supplied separately from the cooling water so that the water receives heat from the high temperature cooling water.

The hot water generated by the hot water heat exchanger (50) is stored in the hot water storage tank (51) and can be supplied to hot water consumers such as buildings.

In the case where hot water is not used in the hot water consumer, water is not supplied to the hot water heat exchanger 50, and the temperature of the cooling water rises. To prevent this, a separate heat radiator 70 is installed, You can throw away.

The radiator 70 dissipates heat by exchanging heat with the air by means of a plurality of fins, and the heat dissipating fan 72 may be provided to accelerate heat dissipation.

The cooling water flow path from the engine 30 is branched into the hot water heat exchanger 50 and the radiator 70 and a three-way valve 53 is provided at the branch point to control the flow direction of the cooling water according to the situation . The cooling water can be sent only to the hot water heat exchanger 50 or only to the radiator 70 by the three-way valve 53 or can be divided into the hot water heat exchanger 50 and the radiator 70 at a predetermined ratio depending on the situation.

Way valve 53 and radiating from the radiator 70 can be combined with the cooling water that has passed through the three-way valve 53 and passed through the hot water heat exchanger 50 and then introduced into the engine 30.

The cooling water circulating passage is provided with a cooling water pump 55 to adjust the flow rate of the cooling water. This cooling water pump 55 can be installed downstream of the hot water heat exchanger 50 and the radiator 70 and upstream of the engine 30 in the cooling water circulation flow path.

On the other hand, the exhaust gas flowing through the exhaust manifold 34 of the engine 30 operates the turbocharger 20 described above. However, the exhaust gas heat exchanger 60 may be provided to recover the waste heat of the exhaust gas. have.

The exhaust gas heat exchanger 60 is arranged between the cooling water pump 55 and the upstream side of the engine 30 in the cooling water circulating flow passage and can be configured to exchange heat between the exhaust gas discharged through the turbocharger 20 and the cooling water . The exhaust heat of the exhaust gas can be recovered through the exhaust gas heat exchanger (60).

The cooling water is heated to some extent while flowing through the exhaust gas heat exchanger 60 and flows into the engine 30 in a lukewarm state, but the cooling water can sufficiently cool the engine 30.

Exhausted gas passing through the exhaust gas heat exchanger 60 passes through the muffler 80 and the exhaust side noise of the engine can be reduced by the muffler 80. [

The exhaust gas that has passed through the muffler 80 can be discharged to the outside after passing through the drain filter 85. The drain filter 85 has a built-in hydride filter for purifying the condensed water generated in the muffler 80, the exhaust gas line, etc., so that the acidic condensed water can be purified and neutralized and flow out to the outside.

Fig. 2 is a schematic diagram showing an example of a state in which a plurality of power generation systems are connected in parallel, and Fig. 3 is a block diagram of an individual power generation system.

Referring to FIGS. 2 and 3, the engine power generation system may include a plurality of power generation systems 100, 101, 102, and 103 connected in parallel with each other.

These power generation systems 100, 101, 102 and 103 drive the generator 40 using the gas engine 30 and the power generated by the generator 40 is converted through the power converter 90, ; 10).

In some cases, the power generation systems 100, 101, 102, and 103 may not include a device for converting heat generated in the system described in FIG. 1 into hot water or the like. Hereinafter, a state in which a plurality of power generation systems are connected in parallel is referred to as a parallel power generation system.

This parallel power generation system may include a master power generation system 100 having the final control right and at least one slave power generation system 101, 102, 103 controlled by the master power generation system 100.

That is, although each of the power generation systems includes a control unit, the final control right in the power generation process can be achieved in the control unit included in the master power generation system 100.

This parallel power generation system generates and supplies electric power according to the electric power demand of the receiving end.

That is, in consideration of the power generation capacity of the individual power generation system, a plurality of power generation systems are connected in parallel to supply power to the power generation end. This parallel power generation system regulates the amount of electric power according to the demand amount of the water front like one building.

For example, if the maximum power generation capacity of an individual power generation system is 30 kW / h and a total of 10 power generation systems are connected, it can supply a maximum of 300 kW / h.

As mentioned above, the individual power generation system may include a power converter (power conversion device) 90 that converts the power generated in the generator 40 and transfers it to the system 10. [ This power converter 90 can be regarded as belonging to the master power generation system 100.

The power converter 90 may include a converter 91 connected to the generator 40 and an inverter 92 connected to the system 10. The DC converter 50 is connected between the converter 91 and the inverter 92, (DC link) capacitor C can be located.

The converter 91 converts the input AC power generated by the generator 40 into DC power. The converter 91 may use a DC-DC converter operating as a power factor control (PFC) unit.

In addition, such a DC-DC converter can use a boost converter. The converter 91 may be a concept including a rectifying part.

The inverter 92 is provided with a plurality of inverter switching elements and can convert the DC power supplied from the converter 91 to an AC power of a predetermined frequency and output it by the ON / OFF operation of the switching element.

For example, if the system 10 is an air conditioner using a three-phase AC motor as a compressor, the inverter 92 can output three-phase AC power for driving the AC motor and supply it to the air conditioner.

At this time, a DC power source, which is produced by the generator 40 and supplied through the converter 91, is stored in the DC stage capacitor C. In the inverter, the power stored in the DC capacitor C can be converted into an AC power and output.

If a fault occurs in any power generation system among the individual power generation systems, the greater the amount of power supplied by the system, the greater the possibility of failure and damage of each part, which may affect the life span of the entire system.

For example, assuming a failure of the inverter 92 of the power inverter 90, the following situation may occur.

First, since the gas engine 30 can no longer supply current to the generator 40 due to dropout of the load, the gas engine 30 connected to the generator 40 and the belt is instantaneously rotated at several revolutions (RPM) .

In the case of a low-speed gas engine, if it does not overcome the mechanical resistance, it may be damaged or overloaded, which may affect the service life.

In the case of the generator 40, when the number of revolutions of the gas engine 30 rises sharply, the generator 40 connected by a belt at a ratio of 1: 3 is accelerated instantaneously, which is three times that of the gas engine 30 .

At this time, if the increase in the number of revolutions exceeds the design margin of the generator 40, the bearing may be damaged, life may be shortened, and insulation of the coil may be destroyed.

On the other hand, from the point of view of the power conversion apparatus 90, if the voltage generated due to a sharp increase in the number of revolutions of the generator 40 is larger than the internal pressure of the converter 91 and the duration is longer than the surge assurance time on the data sheet, breakage may occur.

At this time, even if the converter 91 is broken, the voltage across the DC stage capacitor C may be overcharged due to the voltage induced until that time.

If the overcharged voltage is greater than the breakdown voltage of the DC capacitor C, the DC capacitor C may be damaged and exploded.

Also, there is a high possibility that SMPS, control unit, and relay board, which are connected peripheral parts sharing the ground line, are damaged and damaged together.

Accordingly, when a fault occurs in any one of the power generation systems among individual power generation systems, measures are needed to cope with it.

4 is a block diagram illustrating a parallel power generation system according to an embodiment of the present invention.

Referring to Fig. 4, the parallel power generation system includes power conversion devices 90, 90a, 90b, and 90c, respectively.

As described above, each of the power converters 90, 90a, 90b, and 90c includes a DC stage capacitor C, which is connected to the DC of the power converters 90, 90a, 90b, The capacitors C are connected to each other by the connection switches 120 and 130. [

4 shows a state where three slave power generation systems 101, 102 and 103 are connected to a master control system 110 of the master power generation system 100 (see FIG. 1), only a few are shown here, Of course, a number of slave power generation systems can be connected.

Further, the master power generation system 100 may also be installed at a position equivalent to the remaining slave power generation systems 101, 102, and 103.

As shown in the figure, a central power generation system (hereinafter referred to as a second power generation system) 102 may be connected by a left power generation system (hereinafter referred to as a first power generation system) 101 and a first connection switch 120. The second power generation system 102 may be connected to the right power generation system (hereinafter, referred to as a third power generation system) 103 by the second connection switch 130.

That is, the first power generation system 101 and the DC power capacitor C of the second power generation system 102 can be electrically connected to each other by the first connection switch 120.

In addition, the second connection system 130 and the second connection system 130 can be electrically connected to each other through the DC stage capacitor C of the third power generation system 103.

The first power generation system 101 may include a first control unit 111 and the second power generation system may include a second control unit 112. The third power generation system 103 may include a third control unit 113 ).

The first control unit 111, the second control unit 112 and the third control unit 113 may be connected to the master control unit 110, respectively.

At this time, the first connection switch 120 and the second connection switch 130 may be connected to the master control unit 110, respectively. That is, the first connection switch 120 may be connected to the master control unit 110 through the first path 122 and the second connection switch 130 may be connected to the master control unit 110 Can be connected.

However, when the parallel power generation system is operating normally, the first connection switch 120 and the second connection switch 130 are maintained in the OFF state. That is, the first connection switch 120 and the second connection switch 130 can operate when a fault occurs in the parallel power generation system.

More specifically, when at least one of the individual power generation systems 101, 102, 103 constituting the parallel power generation system has failed, the first connection switch 120 and the second connection switch 130 can operate.

3, each of the individual power generation systems 101, 102 and 103 generates electric power by the gas engine 30 and the generator 40 and supplies electric power to the electric power conversion apparatus 90a , 90b, 90c to the system. As described above, this overall operation control can be performed by the master control unit 110 included in the master generation system 100. [

FIG. 5 is a block diagram illustrating an operation of a parallel power generation system according to an embodiment of the present invention when a failure occurs. FIG. 6 is a flowchart illustrating an operation of a parallel power generation system according to an exemplary embodiment of the present invention.

The parallel power generation system according to an embodiment of the present invention as described above can be operated by the master control unit 110. [

The master control unit 110 detects whether at least one of the power generation systems in the parallel generation system is malfunctioning (system fault occurs) (S10). That is, the master control unit 110 can continuously determine whether the parallel power generation system is operating normally.

As a result of the detection, if at least one of the power generation systems is determined to be in failure, a connection switch connected between the power generation system determined as such a failure and the adjacent power generation system is turned on (S30) and power generation amount control S40 for controlling the power generation amount can be performed.

For example, when a failure occurs in the second power generation system 102, the first connection switch 120 and the second connection switch 130 connected to the second power generation system 102 are controlled by the master control unit 110 (ON) state (S30).

The first connection switch 120 may be connected to the master control unit 110 through the first path 122 and the second connection switch 130 may be connected to the master control unit 110 via the second path 132, 110). The first connection switch 120 and the second connection switch 130 can be controlled by the master control unit 110 by the first path 122 and the second path 132. [

In this way, when a failure occurs in the second power generation system 102, the power conversion apparatus 90b included in the second power generation system 102 can be stopped. The converter 91 and the inverter 92 of the power conversion apparatus 90b may be stopped.

Then, in the power generation system adjacent to the second power generation system 102 in which such a failure occurs, in this example, the first power generation system 101 and the third power generation system 103 perform an emergency operation.

This emergency operation may be the power generation amount control S30 and may be based on the generation output of the first power generation system 101 and the third power generation system 103 based on the last output before the failure of the second power generation system 102 in which the failure occurs (S40).

In order to control the inversion amount S40, first, the power up slope of the DC stage capacitor C of the adjacent power generation system is determined (S31). That is, it is possible to determine whether the power rising slope of the DC stage capacitor C included in the first power generation system 101 and the third power generation system 103 exceeds the set value (S31).

At this time, if the power up slope of the DC stage capacitor C included in the first power generation system 101 and the third power generation system 103 is less than the set value, the power generation amount is maintained as it is (S50). That is, the first power generation system 101 and the third power generation system 103 maintain power generation through the normal control (S20).

Here, the set value may be an optimal value determined by the scale of the parallel power generation system and the applied power amount.

As a result of the determination, if the power up slope of the DC stage capacitor C included in the first power generation system 101 and the third power generation system 103 exceeds the set value, the power generation amount control process S40 may be performed.

This power generation amount control S40 largely calculates the power generation amount corresponding to the power rising slope of the adjacent power generation system, that is, the DC power capacitor C included in the first power generation system 101 and the third power generation system 103 (S41), and the power generation amount corresponding to the power generation amount thus calculated can be reduced (S42).

Then, the constant voltage control of the DC stage capacitor C can be performed using the reduced power generation amount (S43).

Thereafter, it is judged whether or not a voltage other than the amount of electricity generated by the system of its own is inputted to the DC capacitor C (S44), and the power generation amount can be readjusted.

That is, if a voltage other than the amount of power generated by the system of its own is input to the DC stage capacitor C, the power generation amount can be further reduced. That is, the process can return to step S42.

On the other hand, if a voltage other than the amount of power generated by the system is not inputted to the DC stage capacitor C, the first connection switch 120 and the second connection switch 130 are turned off again (S60) .

After the first connection switch 120 and the second connection switch 130 are turned off again, normal control is entered (S20).

As described above, when a failure occurs in one power generation system during the connection operation of the parallel connection power generation system, the inverter operation of the power generation system is stopped, and the DC power capacitor C may become an overvoltage state and become unstable.

However, if the DC link of the adjacent power generation system is shared in such a situation, the capacity of the DC stage capacitor C is combined with the total amount to increase the stability, and the power of the converter of the adjacent power generation system So that it is possible not to waste the energy by supplying the surge energy to the front end without burning.

In this power generation system, as many power generation systems are connected, components such as break chopper, IGBT element, and resistor installed in the power converter DC capacitor C of each power generation system can be omitted, There is an advantage advantageous in securing.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

30: engine 40: generator
90: Power converter 100: Master power generation system
101, 102, 103: Slave power generation system
110: master control unit 111: first control unit
112: second control unit 113: third control unit
120: first connection switch 130: second connection switch

Claims (10)

A plurality of power generation systems each including a power conversion device and connected in parallel with each other;
A connection switch for connecting the DC stage capacitors in the power converter of the neighboring power generation system to each other; And
And a control unit for controlling the power conversion device and the connection switch,
Wherein the control unit performs power generation amount control for turning on the connection switch connected between the power generation system determined as the failure and the adjacent power generation system and controlling the power generation amount by determining whether at least one of the power generation systems is out of order, Parallel power generation system. The power generation control system according to claim 1,
Wherein the power generation amount corresponding to the power increase slope of the DC stage capacitor is calculated to reduce the power generation amount corresponding to the calculated power generation amount. 3. The parallel generation system of claim 2, wherein the power generation amount control further determines whether a voltage other than the power generation amount flows into the DC step capacitor, and further reduces the power generation amount when a voltage other than the power generation amount flows. The apparatus of claim 1,
Wherein the power generation amount control unit determines whether the power increase slope of the DC stage capacitor of the adjacent system exceeds a set value and performs the power generation amount control when the power increase slope exceeds a set value. 5. The apparatus of claim 4,
And maintains the power generation amount when the power increase slope is equal to or less than a set value. The power generation system according to claim 1,
A master power generation system including the control unit; And
And at least one slave power generation system controlled by the master power generation system. The power generation system according to claim 1,
Wherein the power generation amount control unit performs power generation amount control for turning on a connection switch connected to both sides of the DC stage capacitor of the power generation system determined as the failure and controlling the power generation amount when any one of the slave power generation systems is determined as a failure. A control method for a plurality of power generation systems having a connection switch connected in parallel to each other and connecting DC-side capacitors of adjacent systems to each other,
Determining whether at least one of the plurality of power generation systems is out of order;
Turning on the connection switch connected between the power generation system determined to be faulty and the adjacent power generation system if at least one of the systems is determined to be faulty;
Determining whether a power rising slope of the DC stage capacitor of the adjacent power generation system exceeds a set value;
Performing power generation amount control to reduce the power generation amount when the power increase slope exceeds the set value; And
And maintaining the power generation amount when the power increase slope is less than a set value. 9. The method as claimed in claim 8,
Calculating a power generation amount corresponding to a power increase slope of the DC stage capacitor;
Reducing the power generation amount corresponding to the calculated power generation amount; And
And controlling the DC stage capacitor to be a constant voltage. 10. The method of claim 9,
Determining whether a voltage other than the power generation amount flows into the DC stage capacitor, and decreasing the power generation amount when a voltage other than the power generation amount is inputted; And
And turning off the connection switch when a voltage other than the generated power does not flow.

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