JP6598738B2 - Power converter - Google Patents

Description

  The present invention relates to a power conversion device that controls power flow from a power system using power from a power generation device such as solar power generation or a power storage device such as a storage battery.

  As a prior art, a power receiving facility that receives power from the power system and a load group connected in parallel from the power receiving facility are provided for converting alternating current into direct current, storing power, and storing the stored power into alternating current. From the plurality of power supply devices that convert and discharge, the received power measuring instrument that measures the power received from the power system, and the measured received power and the upper limit value of the power received from the set power system A distributed power supply system having a function of generating discharge current command values for a plurality of power supply devices has been proposed (see, for example, Patent Document 1 below).

JP 2003-116225 A

  In a power conversion device that uses a power generation device such as a power storage device or solar power generation as an input, generally, in order to control the power from the power storage device, the power generation device, or the like, as described in the prior document 1, A power converter such as a DC / DC converter is connected, a power buffer element such as a direct current capacitor is provided at the output of the DC / DC converter, and the output power to the power system is controlled via the power buffer element. A configuration in which a converter such as a DC / AC inverter is connected is employed. And in such a power converter device, it is used in order to control the electric power supply (purchased electric power) from a power grid to a consumer load (henceforth only load) with electric power, such as an electrical storage device or a power generator.

  Here, in such a power conversion device that controls the purchased power from the power system to the load, when performing so-called double power generation in which the power storage device and the power generation device are combined, the power from the power storage device is supplied to the power system. There is a request to control so as not to sell power, and a request to control so that the power sold to the power system of the power generation device is not increased by the power of the power storage device.

  Further, when such control is performed, the internal loss of the power converter varies depending on the power handled, and is often not considered. For this reason, in the conventional power converter, as shown in the prior art document 1, the purchased power or the load power is detected, and the purchased power or the power supplied from the power storage device or the power generator to the load is controlled. The output power of the DC / DC converter connected to the power storage device is controlled so as to be a value.

  When such control is performed, the state of a power buffer element such as a DC capacitor interposed between the DC / DC converter and a DC / AC inverter connected to a power system or a load (that is, voltage or current). ) Changes, the DC / AC inverter detects the state change of the power buffer element that occurs as a result of controlling the output power of the DC / DC converter, and the output power to the load so as to suppress the state change. To control.

  As described above, the state change of the power buffer element generated as a result of controlling the output power of the DC / DC converter is likely to cause a time delay with respect to the change of the output power of the DC / DC converter. Moreover, since the DC / AC inverter detects and controls the state change of the power buffer element with a time delay with respect to the output of the power storage device, it impedes the speeding up of the overall control of the power conversion device. There was a problem.

  In addition, when it is difficult to speed up the control of the power purchased by the power converter and the power supply to the load, the control of the power converter can sufficiently catch up with changes in the purchased power or the load power. However, the amount of deviation from the control target value of the purchased power or the power supplied from the power conversion device to the load is increased, and there is a possibility that the utilization rate of the stored power or the generated power is reduced.

  The present invention has been made in view of the above problems, and can control the purchased power from the power system and the power supply to the load at a high speed. An object of the present invention is to provide a power converter that can reduce the amount of deviation of the power supplied to the load from the control target value and suppress a decrease in the utilization rate of the stored power or generated power.

A power converter according to a first aspect of the present invention includes a first converter that controls input power from an input power source, a second converter that controls power supplied to a power system and a consumer load, and the first converter. And a power buffer element connected between the first converter and the second converter, and the first converter and the power converter so that the purchased power from the power system to the consumer load becomes a preset target value. A power control unit for controlling input / output power of the second converter,
The power control unit includes a power information detection unit that directly or indirectly detects information on purchased power supplied from the power system to the customer load, and purchased power detected by the power information detection unit. Input power control that compares the purchased power command value that is the control target value and creates an input power command value for controlling the input power from the input power supply to the first converter according to the difference between the two And the input power command value created by the input power control unit, and based on the input power command value, a reference output power command value that serves as a reference for the control target of the output power of the second converter A reference output power command value generation unit for generating the power buffer, a detection value indicating a state change of the power buffer element due to a power difference between the output power of the first converter and the output power of the second converter, and the power State of buffer element An output power control unit that compares a state reference command value as a reference for change and generates an output power command value for output power control for the second converter according to a difference between the two, and the output power control unit An adding unit that adds the reference output power command value generated by the reference output power command value generation unit to the output power command value generated in step S3 and gives the added value to the second converter; It is characterized by including.

Moreover, the power converter device which concerns on 2nd invention is the 1st converter which controls the input power from an input power supply, the 2nd converter which controls the electric power supplied to a power system and a consumer load, The said 1st A power buffer element connected between the converter and the second converter, and the first converter so that the purchased power from the power system to the consumer load becomes a preset target value. And a power control unit for controlling input / output power of the second converter,
The power control unit includes a power information detection unit that directly or indirectly detects information on purchased power supplied from the power system to the customer load, and purchased power detected by the power information detection unit. Input power control that compares the purchased power command value that is the control target value and creates an input power command value for controlling the input power from the input power supply to the first converter according to the difference between the two A reference output power command value generation unit that detects the output power of the first converter and generates a reference output power command value that is substantially equal to the detected output power, and the output power of the first converter And a detection value indicating a state change of the power buffer element due to a power difference between the output power of the second converter and a state reference command value serving as a reference for the state change of the power buffer element. Depending on the difference between the two An output power control unit that generates an output power command value for output power control with respect to the second converter, and the reference output power command value generation unit that generates the output power command value generated by the output power control unit. And an adding unit that adds the reference output power command value and gives the added value to the second converter.

  According to the power converter of the present invention, the reference output power command value generation unit is provided, and the input power command value for controlling the input power to the first converter is set to the second reference output power command value generation unit. A reference output power command value is generated by giving it as a reference value for controlling the output voltage of the converter, or a reference output power command value having a value substantially equal to this output power by detecting the output power of the first converter By generating the power difference, it becomes possible to share the power difference between the plurality of converters in advance. For this reason, it is possible to control the purchased power of the power conversion device and the power supply to the load at high speed, from the control target value of the purchased power by the power storage device and the power generation device and the power supplied from the power conversion device to the load. It is possible to reduce the amount of deviation of the power and suppress a decrease in the utilization rate of the stored power and generated power.

It is a functional block diagram which shows the whole system configuration | structure of the power converter device by Embodiment 1 of this invention. It is explanatory drawing of the electric energy of each part of the power converter device by Embodiment 1 of this invention, and a restriction matter. FIG. 3 is a time chart showing the power change state of each part when the load power fluctuates when the reference output power command value generation part is not provided in the power control part of the power conversion device having the configuration of FIG. 1. FIG. 3 is a time chart showing the power change state of each part when the load power fluctuates when a reference output power command value generation unit is provided in the power control unit of the power conversion device having the configuration of FIG. 1. It is a functional block diagram which shows the whole system configuration | structure of the power converter device by Embodiment 2 of this invention.

Embodiment 1 FIG.
1 is a functional block diagram showing an overall system configuration of a power conversion apparatus according to Embodiment 1 of the present invention.

  The power conversion device 10 according to the first embodiment includes a first converter 1 that controls input power from an input power source 3 including a power generation device such as solar power generation and a power storage device such as a storage battery, a power system 4 and a load 5. To reduce the power difference between the first and second converters 1 and 2 connected to the second converter 2 that controls the power supplied to the first converter 1 and the second converter 2 Power buffer element 6 such as a DC capacitor, and a power control unit for detecting the purchased power and the load power and controlling the power of the first converter 1 and the second converter 2 so that each becomes a control target value. 7.

  In the present embodiment, the first converter 1 is composed of a single DC / DC converter, and the second converter 2 is composed of a single DC / AC inverter. However, the present invention is not limited to such a configuration. For example, the first converter 1 has a configuration in which a plurality of DC / DC converters are connected in parallel, or a combination of a DC / DC converter and a DC / AC inverter. The second converter 2 may have a configuration in which a plurality of DC / AC inverters are connected in parallel.

  The power control unit 7 includes a power information detection unit 7a, an input power control unit 7b, a reference output power command value generation unit 7c, an output power control unit 7d, and an addition unit 7e.

  Here, the power information detection unit 7a directly or indirectly detects information on the power supplied from the power system 4 to the load 5 (hereinafter referred to as purchased power), and obtains the purchased power from the power system 4. calculate. That is, in addition to directly detecting the purchased power information P1 supplied from the power system 4 to the load 5, the load power information P2 of the power supplied to the load 5 (hereinafter referred to as load power) and the second converter 2 The purchased power may be calculated indirectly based on the output power information P3, or may be calculated indirectly based on the load power information P2.

  The input power control unit 7b compares the purchased power detected by the power information detection unit 7a with the purchased power command value that is the control target value, and the input power to the first converter 1 according to the difference between the two. An input power command value for controlling the input power from 3 is created.

  The reference output power command value generation unit 7c receives the input power command value given to the first converter 1 from the input power control unit 7b, and serves as a reference for the control target of the output power of the second converter 2 An output power command value is generated. In this case, the reference output power command value is substantially equal to the input power command value output from the input power control unit 7b.

  The output power control unit 7d uses the detected value of the state change of the power buffer element 6 due to the power difference between the output power of the first converter 1 and the output power of the second converter 2 as the state change of the power buffer element 6. And the output power command value for controlling the output power for the second converter 2 is generated according to the difference between the two.

  In the first embodiment, the detected value of the voltage change is used as the detected value of the state change of the power buffer element 6. Therefore, the state reference command value that becomes the reference of the state change of the power buffer element 6 is used. Is also a device voltage command value. However, the detected value of the state change of the power buffer element 6 is not limited to the detected value of such a voltage change, and the output power of the first converter 1 and the second power, such as the current or power of the power buffer element. Any detection value may be used as long as it is a value for detecting a state change of the power buffer element 6 due to a power difference from the output power of the converter 2.

  The adding unit 7e adds the reference output power command value generated by the reference output power command value generating unit 7c to the output power command value generated by the output power control unit 7d, and finally adds the added value to the second output power command value. A command value for output power control is given to the converter 2.

Here, the request | requirement requested | required of the power converter device 10 in case the input power supply 3 contains an electrical storage apparatus is demonstrated.
FIG. 2 is an explanatory diagram of the amount of power of each part of the power conversion apparatus 10 and restrictions.

  The power of the power generation device 3a such as solar power generation or the power storage device 3b such as a storage battery constituting the input power supply 3 is supplied from the power system 4 to the load 5 (purchased power) for the purpose of peak cut or peak shift. May be used to control In such a case, the electric power purchased from the power storage device 3 b is discharged toward the electric power system 4 and supplied to the load 5 to adjust the amount of electric power purchased. Here, for example, when the power storage device 3b is operated, ideally, a power purchase power command is obtained by (load power) − (power purchase command value) = (output power of the power conversion device). The amount of electric power purchased according to the value can be realized.

  However, in the power conversion device 10 that controls the purchased power by using the power storage device 3b, there is a request to control so that the power from the power storage device 3b is not sold to the power system 4. As a response to this request, there is a method of detecting the purchased power or load power and suppressing the output power of the power converter 10 so that the output power of the power converter 10 does not exceed the load power.

  However, in this method, as shown in FIG. 2, when so-called double power generation is performed in which the power generation device 3a and the power storage device 3b are operated in combination, the output power of the power conversion device 10 does not exceed the load power. Therefore, surplus power of the power generation device 3a cannot be sold to the power system 4, and the generated power must be discarded, which causes a problem that the utilization efficiency of the power generation device 3a is reduced. For this reason, the purchased power is generally controlled such that the purchased power or the load power is detected and the input power from the power storage device 3b does not exceed the load power.

  Next, the operation of the power conversion device 10 according to the first embodiment of the present invention will be described using an example when the load power varies.

First, in order to facilitate understanding of the present invention, the operation in the case where the reference output power command value generation unit 7c is not provided in the power control unit 7 will be described.
FIG. 3 is a time chart showing the power change state of each part when the load power fluctuates when the power control unit 7 of the power conversion apparatus 10 is configured not to include the reference output power command value generation unit 7c.

  As shown in FIG. 3B, the output power of the first converter 1 in the steady state before the load power fluctuation is substantially equal to the load power, and the load power is changed from the state where the purchased power is substantially equal to the purchased power command value. It is assumed that it increases steeply in a step shape (time t0). When the load power increases, the purchased power becomes larger than the purchased power command value.

  The power information detection unit 7a of the power control unit 7 detects the output power information P3, the load power information P2, or the purchased power information P1 of the power converter 10, and purchases the power purchased from the power system 4 based on each information. Is calculated. The input power control unit 7b compares the purchased power calculated by the power information detection unit 7a with a preset purchased power command value. Then, the input power command value for controlling the input power input from the input power source 3 to the first converter 1 is increased so as to fill the difference between the purchased power and the purchased power command value.

  In this case, the input power command value output from the input power control unit 7b from the request when the input power supply 3 includes the power storage device 3b in addition to the power generation device 3a is the input power from the power storage device 3b. It is given as long as the load power is not exceeded.

  Upon receiving the input power command value from the input power control unit 7b, the first converter 1 receives the input power as shown in FIG. 3C so that the input power from the input power source 3 becomes equal to the input power command value. (Time t0).

  Even when the first converter 1 increases the input power from the input power source 3 (after time t0), the output power of the second converter 2 increases for a while (period from time t0 to t1). The previous output power remains unchanged. That is, the second converter 2 outputs power that is substantially equal to the load power. Therefore, when the first converter 1 increases the input power at time t0, the output of the first converter 1 becomes larger than the output of the second converter 2, so that the output power of the first converter 1 and the second power The difference between the output powers of the converter 2 is supplied to the power buffer element 6, and as a result, the voltage of the power buffer element 6 increases as shown in FIG.

  The output power control unit 7d detects a change in the element voltage, which is a state change of the power buffer element 6, compares the detected element voltage with an element voltage command value serving as a control target value, and detects the detected power buffer. The output power command value is generated so that the element voltage of the element 6 matches the element voltage command value, and this is given to the second converter 2.

  Since the second converter 2 controls the output power so as to coincide with the output power command value, the output power of the second converter 2 is increased as shown in FIG. t1). And if the 2nd converter 2 comes to output the input power of the 1st converter 1 of the quantity substantially equal to the increase amount of load electric power, purchased power and purchased power command value will correspond substantially (time t2). ).

  As described above, since the increase amount of the voltage of the power buffer element 6 is proportional to the output power of the first converter 1, the output of the second converter 2 according to the increase amount of the voltage of the power buffer element 6. By increasing the power, the output power of the first converter 1 and the output power of the second converter 2 can be matched. That is, when the load power fluctuates, the second converter 2 outputs the input power of the first converter 1 that is approximately equal to the increase amount of the load power, so that the purchased power and the purchased power command value are substantially equal. It is possible to match (after time t2).

  As described above, when the power control unit 7 is not provided with the reference output power command value generation unit 7c, the input power from the input power source 3 is controlled by the first converter 1, and accordingly, The purchased power is controlled by indirectly controlling the output power of the second converter 2.

  Here, a DC capacitor is usually used as the power buffer element 6. The voltage of the DC capacitor increases in proportion to the change of the inflow power, but the increase of the voltage of the DC capacitor is accompanied by a time delay with respect to the change of the inflow power. For this reason, when controlling the power converter device 10 as described above, the voltage change of the power buffer element 6 takes time with respect to the change of the output power of the first converter 1 due to the change of the input power from the input power supply 3. Therefore, the change in the output power of the second converter 2 is also delayed with respect to the change in the input power from the input power supply 3.

  As a result, when the load power fluctuates, the time (the period from time t0 to t2 in FIG. 3) that the purchased power gets on and off the purchased power command value becomes longer. When the purchased power is separated from the purchased power command value, the load power is supplied from the power system 4. Then, the utilization rate of the stored power and the generated power is reduced by this supplied power.

  Therefore, in the first embodiment of the present invention, the power control unit 7 is provided with the reference output power command value generation unit 7c in order to solve the above problems.

  FIG. 4 is a time chart showing the power change state of each unit when the load power fluctuates when the power control unit 7 of the power conversion apparatus 10 is configured to include the reference output power command value generation unit 7c.

  As shown in FIG. 4B, from the state where the output power of the first converter 1 in the steady state before the load change is approximately equal to the load power and the purchased power is substantially equal to the purchased power command value, the time t5 is reached. It is assumed that the load power suddenly increases stepwise at the time (time t5).

  In this case, since the purchased power becomes larger than the purchased power command value, the input power control unit 7b causes the first converter from the input power source 3 to fill the difference between the purchased power and the purchased power command value. As shown in FIG. 4C, the input power command value for controlling the input power from the input power supply 3 is increased so that the input power input to 1 becomes equal to the input power command value.

  Further, the input power command value from the input power control unit 7b is also given to the reference output power command value generation unit 7c at the same time. The reference output power command value generation unit 7 c generates a reference output power command value that is substantially equal to the input power command value given to the first converter 1 as a reference value when controlling the output power of the second converter 2. To do.

  The output power control unit 7d also changes the element voltage (state change detection value) that is a state change of the power buffer element 6 due to the power difference between the output power of the first converter 1 and the output power of the second converter 2. ) Is detected, and the detected element voltage is compared with the element voltage command value (state reference command value) as the control target value, and the detected element voltage of the power buffer element 6 matches the element voltage command value. Thus, an output power command value corresponding to the difference is generated.

  Then, the adding unit 7e adds the reference output power command value generated by the reference output power command value generating unit 7c to the output power command value generated by the output power control unit 7d. Finally, it is given to the second converter 2 as a command value for output power control.

  Since the second converter 2 controls the output power so as to coincide with the output power command value, the output power of the second converter 2 is increased as shown in FIG. t6). And when the 2nd converter 2 comes to output the input power of the 1st converter 1 of the amount substantially equal to the increase amount of load electric power, purchased power and purchased power command value substantially correspond (time t7). ).

  By this control, the output power of the second converter 2 and the output power of the first converter 1 change at substantially the same speed and become substantially the same value. For this reason, the difference between the output power of the first converter 1 and the output power of the second converter 2 flows into the power buffer element 6 as described above, but the voltage difference between the two is small. As shown in (a), the voltage change of the power buffer element 6 is extremely small.

  That is, since the output power of the first converter 1 and the output power of the second converter 2 due to converter loss and control error have a minute error, the voltage of the power buffer element 6 slightly changes due to the difference. However, since the voltage change is extremely small, the time during which the purchased power deviates from the purchased power command value (period from time t5 to time t7 in FIG. 4) is shortened. Therefore, the output power of the second converter 2 can follow the change of the input power of the first converter 1 at high speed without being affected by the time delay of the state change of the power buffer element 6. It becomes.

  As described above, the power conversion device 10 according to the first embodiment of the present invention includes the reference output power command value generation unit 7c and is substantially equal to the input power command value for output power control of the first converter 1. The reference output power command value is added to the output power command value and given to the second converter 2, so that the reference output power command value generation unit 7 c described above is not provided. It becomes possible to change the output power of the second converter 2 at a substantially equivalent speed with respect to the change of the output power of the first converter 1 due to the change of the input power.

  As a result, the power to be controlled via the state change of the power buffer element 6 is reduced, and the power buffer element 6 may be affected by the time delay of the state change of the power buffer element 6 due to the power flowing into the power buffer element 6. The output power of the second converter 2 can be made to follow the output power of the first converter 1 at high speed.

  Thus, when the load power changes, the purchased power deviates from the purchased power command value due to the delay in the control of the output power of the second converter 2 with respect to the change of the input power command value given to the first converter 1. Since the time (time t5 to t7 in FIG. 4) can be shortened, it is possible to improve the utilization rate of the stored power and the generated power.

  The information detected by the power information detection unit 7a is not limited to the above-described information. For example, when the power generator is configured to be connected via the output end of the power converter 10 or the power buffer element 6. May detect power generation information. Further, the output power information of the power converter 10 may be substituted by the output power command value given to the second converter 2.

Embodiment 2. FIG.
FIG. 5 is a functional block diagram showing the overall system configuration of the power conversion apparatus according to Embodiment 2 of the present invention. Components that correspond to or correspond to the configuration of Embodiment 1 (FIG. 1) are denoted by the same reference numerals. A detailed description is omitted.

  In the second embodiment, the configuration of the power control unit 7 is slightly different from that in the first embodiment. That is, in the second embodiment, the power control unit 7 detects the output power of the first converter 1 (first converter output power information P4 in FIG. 5), and generates the reference output power command value generation. The reference output power command value generation unit 7c generates a reference output power command value serving as a reference for the control target of the output power of the second converter 2 based on the output power of the first converter 1 based on the output power of the first converter 1 It is configured to do.

  As in Embodiment 1, when the input power command value from the input power control unit 7b is given to the reference output power command value generation unit 7c, the output of the first converter 1 is Differences occur due to loss of the first converter 1 and control error. The difference occurs as a difference between the output power of the first converter 1 and the output power of the second converter 2 immediately after the load change. This difference flows into the power buffer element 6 and is corrected by the output power control unit 7d. However, since this difference is affected by the time delay of the state change (voltage change) of the power buffer element 6, The amount of temporary divergence between the power and the purchased power command value increases, which hinders improvement in the utilization rate of stored power and generated power.

  On the other hand, in the power conversion device according to the second embodiment, the output power of the first converter 1 is detected as input information to the reference output power command value generation unit 7c, and based on the detected output power. Since the reference output power command value generation unit 7c generates a reference output power command value that serves as a reference for the control target of the output power of the second converter 2, it may be affected by errors due to loss of the first converter 1 and the like. Disappear.

As described above, in the power conversion device according to the second embodiment of the present invention, the input information to the reference output power command value generation unit 7c is the output power of the first converter 1, so that As compared with the case where the reference output power command value generation unit 7c generates the reference output power command value based on the input power command value of the first converter 1, the outputs of the first converter 1 and the second converter 2 are as follows. Power error can be reduced. That is, since the amount of purchased power deviating from the purchased power command value can be further reduced, it is possible to improve the utilization rate of stored power and generated power.
Other operations and effects are the same as those in the first embodiment.

  The present invention is not limited to the configuration of the first and second embodiments described above, and a part of the configuration of each of the first and second embodiments is changed without departing from the spirit of the present invention. Or the configuration thereof can be omitted, and the configurations of the first and second embodiments can be appropriately combined.

DESCRIPTION OF SYMBOLS 1 1st converter, 2 2nd converter, 3 input power supply, 3a electric power generating apparatus, 3b electrical storage apparatus, 4 electric power system, 5 load (customer load), 6 element for electric power buffers, 7 electric power control part,
7a power information detection unit, 7b input power control unit, 7c reference output power command value generation unit,
7d Output power controller, 7e adder, 10 power converter.

Claims (4)

A first converter that controls input power from an input power source, a second converter that controls power supplied to a power system and a consumer load, and a connection between the first converter and the second converter And the input / output power of the first converter and the second converter are controlled so that the purchased power from the power system to the consumer load becomes a preset target value. A power control unit,
The power control unit
A power information detection unit that directly or indirectly detects information of purchased power supplied from the power system to the customer load;
The purchased power detected by the power information detection unit is compared with the purchased power command value that is the control target value, and the input power from the input power supply to the first converter is controlled according to the difference between the two. An input power control unit for creating an input power command value for
The input power command value created by the input power control unit is input, and a reference output power command value serving as a reference for a control target of the output power of the second converter is generated based on the input power command value. A reference output power command value generation unit;
A detection value indicating a state change of the power buffer element due to a power difference between the output power of the first converter and the output power of the second converter, and a state reference serving as a reference for the state change of the power buffer element An output power control unit that compares a command value and generates an output power command value for output power control for the second converter according to a difference between the two,
The reference output power command value generated by the reference output power command value generation unit is added to the output power command value generated by the output power control unit, and the added value is added to the second converter. An adder to give,
The power converter device characterized by including. The power conversion apparatus according to claim 1, wherein the reference output power command value generated by the reference output power command value generation unit is a value corresponding to input power of the first converter. A first converter that controls input power from an input power source, a second converter that controls power supplied to a power system and a consumer load, and a connection between the first converter and the second converter And the input / output power of the first converter and the second converter are controlled so that the purchased power from the power system to the consumer load becomes a preset target value. A power control unit,
The power control unit
A power information detection unit that directly or indirectly detects information of purchased power supplied from the power system to the customer load;
The purchased power detected by the power information detection unit is compared with the purchased power command value that is the control target value, and the input power from the input power supply to the first converter is controlled according to the difference between the two. An input power control unit for creating an input power command value for
A reference output power command value generation unit that detects the output power of the first converter and generates a reference output power command value having a value substantially equal to the detected output power;
A detection value indicating a state change of the power buffer element due to a power difference between the output power of the first converter and the output power of the second converter, and a state reference serving as a reference for the state change of the power buffer element An output power control unit that compares a command value and generates an output power command value for output power control for the second converter according to a difference between the two,
The reference output power command value generated by the reference output power command value generation unit is added to the output power command value generated by the output power control unit, and the added value is added to the second converter. An adder to give,
The power converter device characterized by including. When the input power source includes a power storage device, the input power control unit includes the first converter so that the input power to the first converter does not exceed the power supplied to the consumer load. The power converter according to any one of claims 1 to 3, wherein the input power command value is given to.

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