JP2010166723A - Method and device for adjusting power generation output - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform output control of a plurality of power generation devices in real time. <P>SOLUTION: When the total output power of a plurality of power generation devices of a power system supplying power to power load groups and a plurality of power generation devices is different from a target power value being a power value obtained by subtracting a receiving power supplied from the power system from a load power consumed by the power load groups, the power generation output adjusting device makes a plurality of power generation devices adjust the output power in order and in an adjustment amount provided for each of them until the total output power of the power generation devices becomes equal to the target electric power value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power generation output adjustment method and a power generation output adjustment device.

  In a system that supplies energy by using a power system and power generation equipment in combination, it is generally desirable that the power generation equipment be operated at a constant output near an efficient rated power output. In particular, when the power generation facility is a cogeneration facility that supplies both power and heat, such as a fuel cell or a gas engine, the load on the power generation facility is not only in terms of power generation efficiency but also in terms of securing the amount of generated heat. It is necessary to improve the rate. Here, the load factor refers to the ratio between the average demand power and the maximum demand power of the load during a certain period.

  For this reason, in many cases, the system is designed so that the power generation output is set to be equal to or less than the minimum value of the power demand of the supply destination, and the operation is performed at a constant rated output regardless of the fluctuation of the power demand. However, the difference between the maximum power and the minimum power is large, and when the above method is used, only a small part of the required power demand can be generated by power generation, and the effects in terms of economy and energy saving are limited. End up.

  On the other hand, if the power generation capacity exceeds the minimum power demand, a greater effect can be expected in terms of economic or energy savings to the overall demand, but on the other hand, it is necessary to change the power generation output according to fluctuations in power demand Occurs. In this case, unless an appropriate output distribution is set, the operating rate and efficiency are lowered, and the economy is impaired. In particular, in a system composed of a plurality of power generators with different rated outputs, simply setting the output so that the energy consumption efficiency of each power generator is as high as possible is the optimum efficiency point when viewed from the whole system. The output setting is not easy.

  In order to avoid such a state, a system for solving the optimization problem and instructing each power generator in advance with an output setting schedule has been considered (for example, see Non-Patent Document 1).

Isao Suzuki, Mitsuru Kudo, “Microgrid Energy Control System”, Journal of JSES vol.31 No.4, 2005, pp.31-35

  In the system disclosed in Non-Patent Document 1, first, power demand for one day on a specific date is predicted, and a power generation plan on a specific date calculated by an optimization operation based on the predicted power demand is calculated for each power generation. Instruct the device in advance. Each power generation device generates power on a specific date according to a power generation plan commanded in advance. Therefore, when the power generation output is controlled in real time following the fluctuation of power demand, there is a problem that the method cannot always be applied.

  Moreover, according to this system, it is necessary to provide a complicated output command system. Therefore, there is a problem that the configuration of the system becomes complicated and consequently the system is expensive.

  It is an object of the present invention to provide a power generation output adjustment method and a power generation output adjustment device that solve the above-described problems.

  In order to solve the above problems, a power generation output adjustment method of the present invention is a power generation output adjustment method for adjusting output power of a plurality of power generation devices among a power system and a plurality of power generation devices that supply power to a power load group. A target power value that is a power value obtained by subtracting received power supplied from the power system from load power consumed by the power load group and processing for calculating the total output power of the plurality of power generation devices. When the result of the comparison, the process of comparing the total and the target power value, and the comparison result show that the total and the target power value are different, the total and the target power value are the same value. Until it becomes, it has the adjustment process which adjusts the output electric power of this electric power generating apparatus in order with the adjustment amount each given to the said several electric power generating apparatus according to the order set beforehand.

  In the power generation output adjustment method of the present invention, the adjustment processing includes a plurality of zones obtained by dividing between the maximum value and the minimum value of the output power that can be generated by each of the plurality of power generation devices. The output power may be adjusted with the adjustment amount as the adjustment amount.

  Further, in the power generation output adjustment method of the present invention, the power generation device that has adjusted the output power when the total and the target power value become the same value is changed to a power generation device that first adjusts the next output power. You may have the process to set.

  In the power generation output adjustment method of the present invention, when the total and the target power value are different from each other after the total and the target power value become the same value, the total and the target power A process of comparing the first magnitude relationship of the total with respect to the target power value before the value becomes the same value and the second magnitude relationship of the sum with respect to the target power value when the value becomes different In the adjustment order setting process, if the first magnitude relation and the second magnitude relation are different as a result of the comparison, the order may be reset to the reverse order.

  Moreover, in order to solve the said subject, the electric power generation output adjustment apparatus of this invention is the electric power system which supplies electric power to an electric power load group, and the electric power generation output which adjusts the output electric power of these electric power generation apparatus among several electric power generation apparatuses An adjustment device, the storage unit storing the order of the power generation devices for adjusting the output power, the adjustment amount of the output power given to each of the plurality of power generation devices, and a plurality of power generation devices A measurement unit that calculates the total output power; a target value setting unit that calculates a target power value that is a power value obtained by subtracting the received power supplied from the power system from the load power consumed by the power load group; The comparison unit that compares the total and the target power value, and if the total of the output power and the target power value are different as a result of the comparison, until the total and the target power value become the same value , In the storage unit In 憶 is the order presented, and an adjusting unit to continue to adjust the output power of the sequential power-generating device in the adjustment amount stored in the storage unit.

  Moreover, in the power generation output adjustment device of the present invention, the storage unit includes a plurality of zones obtained by dividing between the maximum value and the minimum value of the output power that can be generated by each of the plurality of power generation devices. May be stored as the adjustment amount.

  Further, in the power generation output adjustment device of the present invention, the power generation device that has adjusted the output power when the total and the target power value are the same value is changed to a power generation device that first adjusts the next output power. You may have the adjustment order setting part to set.

  Further, in the power generation output adjusting device of the present invention, when the total and the target power value become different values after the total and the target power value become the same value, the total and the target power Increase / decrease for comparing the first magnitude relationship of the total to the target power value before the value becomes the same value and the second magnitude relationship of the sum to the target power value when the value becomes different A comparison unit, and if the first magnitude relationship and the second magnitude relationship are different as a result of the comparison in the increase / decrease comparison unit, the adjustment order setting unit determines the order stored in the storage unit. You may rewrite in the reverse order.

  According to the present invention, the order in which each of the plurality of power generators adjusts the output power is set in advance, and the amount of adjustment of the output power allowed per time when each power generator adjusts the output power. Set the range. And when making the total value of the output electric power of all the electric power generating apparatuses into a target output value, according to an order, output electric power is adjusted in the range of the adjustment amount of each electric power generating apparatus. When the total value reaches the target output value, the adjustment of the output power is terminated and the order of adjusting the output power is newly set.

  Since it was set as such a structure, the output control of a several electric power generating apparatus can be performed easily in real time.

It is a figure which shows the structure of the electric power generation output adjustment system according to embodiment of this invention. It is a figure which shows the detailed structure of the electric power demand monitoring apparatus shown in FIG. (A) It is a figure which shows an example of the order provided to each electric power generating apparatus by the last output adjustment. (B) It is a figure which shows an example of the order provided when this output adjustment direction and the last output adjustment direction are the same directions. (A) It is a figure which shows an example of the order provided to each electric power generating apparatus by the last output adjustment. (B) It is a figure which shows an example of the order provided when this output adjustment direction and the last output adjustment direction are reverse directions. It is a figure which shows an example of the setting method of the allowable output adjustment range. It is a figure which shows the 1st operation example in which an electric power demand monitoring apparatus adjusts the output of a some electric power generating apparatus. It is a figure which shows the 2nd operation example in which an electric power demand monitoring apparatus adjusts the output of a several electric power generating apparatus. It is a figure which shows the 3rd operation example in which an electric power demand monitoring apparatus adjusts the output of a several electric power generating apparatus. It is a flowchart which shows a series of operation | movement at the time of an electric power demand monitoring apparatus performing output adjustment to a several electric power generating apparatus. It is a flowchart which shows an example of the operation | movement which an electric power demand monitoring apparatus performs output adjustment to a some electric power generating apparatus.

  Hereinafter, a power generation output adjustment method (including a power generation output adjustment device) according to an embodiment of the present invention will be described.

  First, the overall configuration of the power generation output adjustment system of this embodiment will be described.

  As shown in FIG. 1, the power generation output adjustment system includes a plurality of power generation devices F1 to Fn, a power system 1, a power distribution facility 2, a power demand monitoring device 3 (hereinafter simply referred to as “monitoring device 3”), A communication network 4 and a power load group 5 are included. The number of power generation devices F1 to Fn may be arbitrary.

  The power system 1, the power generators F1 to Fn, the monitoring device 3, and the power load group 5 are connected to each other via a power distribution facility 2 for transmitting power. Moreover, the monitoring apparatus 3 and each power generator F1-Fn are each connected via the communication network 4.

  The power system 1 and each of the power generation devices F <b> 1 to Fn supply each power generated to the power load group 5 via the power distribution facility 2. Below, each electric power supplied to the electric power load group 5 by each electric power generating apparatus F1-Fn is called "output electric power."

  The monitoring device 3 measures load power that is power consumed by the power load group 5 and received power that is power supplied from the power system 1 for each arbitrary period. Examples of the received power include commercial power purchased by a user of the power load group 5.

  In addition, the monitoring device 3 measures each output power generated and output individually by the power generation devices F1 to Fn for each arbitrary period, and is the total value of each output power of the power generation devices F1 to Fn. “Power total value” is calculated. The total output power value is “total”.

  The monitoring device 3 sets a target power value based on the load power and the received power every time the load power and the received power are measured. The target power value is a power value that the power generators F1 to Fn need to output in order to operate the power load group 5 normally. In the present embodiment, the monitoring device 3 sets a power value obtained by subtracting the received power from the load power as a target power value.

  The monitoring device 3 is a “power generation output adjustment device” that adjusts the output power of each of the power generation devices F1 to Fn based on the comparison result between the target power value and the total output power value.

When the output power total value and the target power value are different, the monitoring device 3 is assigned to each power generation device Fj (j = 1 to n) until the output power total value and the target power value become the same value. In accordance with j, each output power is sequentially adjusted within the allowable adjustable range P _jk set individually for each power generation device Fj.

In the present embodiment, the allowable output adjustment range P _jk is the amount (range) of output power that can be changed when the power generation device Fj given the j-th initial value adjusts the output power for the kth time. The “adjustment amount” to be determined.

  The monitoring device 3 transmits a signal for adjusting the output power to each of the power generation devices F1 to Fn via the communication network 4.

  Next, the configuration of the power demand monitoring apparatus 3 shown in FIG. 1 will be described in detail with reference to FIG.

  As shown in FIG. 2, the monitoring device 3 includes a measurement unit 31, a target value setting unit 32, an adjustment order setting unit 33, an adjustment range setting unit 34, a storage unit 35, and an output control unit 36. . The output control unit 36 includes a comparison unit 361 and an adjustment unit 362.

  The measuring unit 31 measures the load power consumed by the power load group 5 and the received power supplied from the power system 1 for each arbitrary period. The measuring unit 31 notifies the target value setting unit 32 of the measured values of the load power and the received power every time the load power or the received power is measured.

  Moreover, the measurement part 31 measures each output electric power which the electric power generating apparatus F1-Fn generated separately and output for every arbitrary period. And the measurement part 31 totals each output electric power, whenever it measures each output electric power. The measurement unit 31 notifies the comparison unit 361 of the total output power value obtained by summing the output powers. Here, in this example, it is obtained by directly measuring the load power consumed by the power load group 5. However, since the total difference between the received power and the generated power corresponds to the load power, the load power may be obtained by calculation.

  The target value setting unit 32 sets a target power value based on the load power and the received power every time the measurement unit 31 notifies the load power and the received power, and notifies the comparison unit 361 of the target power value. In the present embodiment, the target value setting unit 32 sets the power value obtained by subtracting the received power from the load power as the target power value.

  The adjustment order setting unit 33 determines the “order” that is the order (chain) of the power generation devices F1 to Fn when the power generation devices F1 to Fn adjust the output power, and stores the order in the storage unit 35. Write.

  Moreover, in this embodiment, the adjustment order setting part 33 gives the initial value of the order which adjusts output power to each electric power generating apparatus F1-Fn based on the determined context. In this embodiment, as shown to Fig.3 (a), 1st-nth is provided to each electric power generation apparatus F1-Fn as an initial value of order, respectively.

  Moreover, the adjustment order setting part 33 provides the new order used for adjustment of the next output power to each of the electric power generating apparatuses F1-Fn, when adjustment of the output electric power by the electric power generating apparatuses F1-Fn is complete | finished. At this time, the adjustment order setting unit 33 assigns a new order according to a predetermined chain of the power generation apparatuses F1 to Fn.

  In this embodiment, when the target power value is reached when the j-th power generation device Fj adjusts the output power, the adjustment order setting unit 33 newly assigns No. 1 to the power generation device Fj. By doing so, the adjustment order setting unit 33 sets the power generation device Fj as the power generation device to be adjusted first when the next adjustment of the output power is performed.

  Furthermore, the adjustment order setting unit 33 adjusts the current output power total value (hereinafter simply referred to as “current output adjustment direction”) and the adjustment direction of the output power total value executed immediately before (hereinafter simply referred to as “current output adjustment direction”). The order of the power generation device Fj that has been newly set to No. 1 is assigned to each power generation device other than the power generation device Fj in response to the “previous output adjustment direction”.

  In the present embodiment, the adjustment order setting unit 33 includes an increase / decrease comparison unit 331 to identify the output adjustment direction.

  When the sign (positive or negative) when the total output power value is subtracted from the target power value is notified from the comparison part 361, the increase / decrease comparison part 331 stores the sign in the storage part 35. This code corresponds to the “first magnitude relationship” of the output power total value with respect to the target power value before the output power total value and the target power value become the same value.

  Thereafter, when the code is further notified from the comparison unit 361, the increase / decrease comparison unit 331 compares the notified code with the code in the storage unit 35.

  This “notified code” indicates the output power relative to the target power value when the total output power value and the target power value become different after the total output power value and the target power value become the same value. This corresponds to the “second magnitude relationship” of the total value.

  As a result of the comparison by the increase / decrease comparison unit 331, when the notified code (second magnitude relationship) matches the code in the storage unit 35 (first magnitude relationship), the adjustment order setting unit 33 outputs the current output. It is identified that the adjustment direction and the previous output adjustment direction are the same direction. In addition, when the notified code (second magnitude relationship) does not match the code in the storage unit 35 (first magnitude relationship), the adjustment order setting unit 33 determines that the current output adjustment direction is the same as the previous output adjustment. Identify that the direction is the opposite direction.

  When the adjustment order setting unit 33 identifies that the current output adjustment direction and the previous output adjustment direction are the same direction, the power generation device Fj newly set as No. 1 is used as the head, and is the same as the previous adjustment order. The order is reassigned according to the direction and written in the storage unit 35. Note that when the current output adjustment direction is the same as the previous output adjustment direction, the previous output adjustment is the reduction direction of the total output power value, and the current output adjustment is also the reduction direction of the total output power value. In some cases, or the previous output adjustment is in the increasing direction of the total output power value, and the current output adjustment is also in the increasing direction of the total output power value.

  In this case, if the previous adjustment order is the order shown in FIG. 3A, the adjustment order setting unit 33 sets the power generator Fj newly set to No. 1 as shown in FIG. As the head, the power generators other than the power generator Fj are reordered according to the same direction as the order shown in FIG.

  In addition, when the adjustment order setting unit 33 identifies that the current output adjustment direction and the previous output adjustment direction are opposite directions, the power generation device Fj newly set as No. 1 is used as the head, and the previous adjustment order is adjusted. The order is reassigned according to the reverse direction and written in the storage unit 35. Thereby, the adjustment order setting unit 33 rewrites the order stored in the storage unit 35 to the reverse order. When the current output adjustment direction and the previous output adjustment direction are opposite to each other, the previous output adjustment is the decreasing direction of the total output power value, and the current output adjustment is the increasing direction of the total output power value. Or the previous output adjustment is in the increasing direction of the total output power value, and the current output adjustment is in the decreasing direction of the total output power value.

  In this case, if the order of the previous adjustment is the order shown in FIG. 4A, the adjustment order setting unit 33, as shown in FIG. The order is reassigned in the reverse direction to the order shown in FIG.

The adjustment range setting unit 34 allows a plurality of zones obtained by dividing the entire range that can be output by the power generation device Fj for each power generation device Fj that is given with the j-th order as an initial value. It is set in advance as the output adjustment range P _jk (adjustment amount). Then, the adjustment range setting unit 34 causes the storage unit 35 to store the allowable output adjustment range P _jk set for each power generation device Fj.

In the present embodiment, as shown in FIG. 5, the adjustment range setting unit 34 allows the allowable output adjustment range P in a region where the change rate of the power generation efficiency of the power generation device Fj is small with respect to the change in the output power of the power generation device Fj. Divide the zone so that _jk is wide. In a region where the rate of change in power generation efficiency is large with respect to change in output power, the zone is divided so that the allowable output adjustment range P _jk is narrowed.

Note that when the allowable output adjustment range P _jk is set, the adjustment range setting unit 34 may divide the entire range that can be output by the power generation device Fj into equal intervals, or divide them into unequal intervals according to a predetermined function or the like. May be.

Further, the adjustment range setting unit 34 may determine a representative point at which predetermined output power is output in the characteristics illustrated in FIG. 5 and set the allowable output adjustment range P _jk using an arbitrary adjustment rate. . For example, when a fixed value (for example, 20%) is determined as the adjustment rate with the point where the output power is 100% of the maximum output power of the power generation apparatus Fj as the first representative point, As the adjustment range P _j1 , 80% to 100% can be set. In this case, if a point at which the output power is 80% with respect to the maximum output power is determined as the second representative point, 64% to 80% can be set as the second allowable output adjustment range P _j2 .

The storage unit 35 includes the order (chain) of the power generation devices F1 to Fn set by the adjustment order setting unit 33, the order given by the adjustment order setting unit 33 to each of the power generation devices F1 to Fn, the initial value of the order, and the adjustment range setting unit. 34 stores arbitrary data including allowable output adjustment range P _jk set.

The output control unit 36 determines the order stored in the storage unit 35 and each allowable output adjustment range P _jk when the total output power value does not match the target power value due to fluctuations in load power consumed by the power load group 5. Then, the output power is adjusted by each power generator Fj.

  The comparison unit 361 compares the total output power value notified from the measurement unit 31 with the target power value notified from the target value setting unit 32 and notifies the adjustment unit 362 of the comparison result.

  The comparison unit 361 calculates a sign (positive or negative) when the total output power value is subtracted from the target power value, and notifies the increase / decrease comparison part 331 of the sign. This code serves to indicate the magnitude relationship of the total output power value with respect to the target power value.

  The adjustment unit 362 identifies whether the total output power value and the target power value are the same based on the comparison result notified from the comparison unit 361.

When the comparison result notified from the comparison unit 361 indicates that the total output power value and the target power value are different, the adjustment unit 362 sends each power generation device Fj to each power generation device Fj according to the order given to the power generation devices F1 to Fn. The output power is adjusted within each allowable output adjustment range P _jk .

  In addition, when the comparison result notified from the comparison unit 361 indicates that the total output power value and the target power value are the same, the adjustment unit 362 ends the adjustment of the output power of the power generation device Fj.

  Below, the operation | movement which the adjustment part 362 controls the output electric power of each electric power generating apparatus F1-Fn so that an output electric power total value and a target electric power value may become the same is demonstrated with reference to FIG. In FIG. 6, initial values (No. 1 to No. n) are assigned to the respective power generation devices F1 to Fn, and all of the power generation devices F1 to Fn are operated at the rated output. As an example, a case where the output power is reduced until the total output power value and the target power value become the same is given.

As shown in FIG. 6, first, the adjustment unit 362 causes the power generation device F <b> 1 given the first value as the initial value of the order to adjust the output power within the allowable output adjustment range P ₁₁ . If the power generation device F1 does not reach a target power value even if the adjustment of the output power at the allowable output adjustment range P _11, adjustment unit 362, the next order (# 2) power generator was given F2 , thereby adjusting the output power in the allowed output adjustment range P _21.

Further, when all of the power generation devices F1 to Fn do not reach the target output value even after the first output adjustment, the adjustment unit 362 allows the power generation device F1 to which the earliest order (first) is given. within the output adjustment range P ₁₂ causes the adjustment of the second output power. Then, the adjustment unit 362 causes each of the power generation devices F1 to Fn to repeatedly execute the above-described operation until a comparison result indicating that the total output power value and the target power value are the same is notified from the comparison unit 361. . The adjustment unit 362 ends the adjustment of the output power when a comparison result indicating that the total output power value and the target power value are the same is notified from the comparison unit 361.

Further, in the present embodiment, the adjustment unit 362 uses the power generation device Fj last in the previous output adjustment when the power generation device Fj performs the next output power adjustment after the adjustment of the output power. The output adjustment is started from the k-th allowable output adjustment range P _jk .

  When the adjustment order setting unit 33 identifies that the current output adjustment direction and the previous output adjustment direction are the same direction, the power generation newly set to No. 1 is exemplified as illustrated in FIG. An order according to the same direction as the order of the previous adjustment starting from the apparatus Fj is given to each power generation apparatus.

In this case, as shown in FIG. 7, the adjustment unit 362 is used last in the previous adjustment for the power generator Fj that has finally adjusted the output so that the total output power reaches the previous target power value. The current output adjustment is started within the allowable output adjustment range P _jk . Subsequently, the adjustment unit 362 causes the power generation device F _{j + 1} that secondly adjusts the output power in the current adjustment to adjust the output power within the allowable output adjustment range P _{j + 1k} .

  In addition, when the adjustment order setting unit 33 identifies that the current output adjustment direction and the previous output adjustment direction are opposite directions, as illustrated in FIG. The order according to the reverse direction of the order of the previous adjustment starting from the device Fj is given to each power generation device.

In this case, as illustrated in FIG. 8, the adjustment unit 362 is used last in the previous adjustment for the power generator Fj that has finally adjusted the output so that the total output power reaches the previous target power value. The current output adjustment is started within the allowable output adjustment range P _jk . Subsequently, the adjustment unit 362 causes the power generation device F _j-1 that adjusts the output power second by the current adjustment to adjust the output power within the allowable output adjustment range P _j-1k .

  Next, a series of operations in which the monitoring device 3 having the above configuration causes the power generation devices F1 to Fn to adjust the output power will be described with reference to FIG. FIG. 9 is a flowchart showing an example of the implementation procedure of the present invention.

  As shown in FIG. 9, first, in step 601, the adjustment order setting unit 33 gives each power generation device F1 to Fn an initial value of the order in which each power generation device F1 to Fn adjusts the output power. In this embodiment, as shown to Fig.3 (a), the 1st-nth is each provided to each electric power generating apparatus F1-Fn.

  The comparison unit 361 compares the total output power value notified from the measurement unit 31 with the target power value notified from the target value setting unit 32 and notifies the adjustment unit 362 of the comparison result.

  In step 602, the adjustment unit 362 identifies whether the comparison result notified from the comparison unit 361 indicates that the total output power value and the target power value are the same.

When the comparison result from the comparison unit 361 indicates that the total output power value and the target power value are different, in step 603, the adjustment unit 362 determines each power generation according to the order given to the power generation devices F1 to Fn. The apparatus Fj is caused to adjust the output power within each allowable output adjustment range P _jk . Then, the adjustment unit 362 causes each of the power generation devices F1 to Fn to repeatedly execute the above-described operation until a comparison result indicating that the total output power value and the target power value are the same is notified from the comparison unit 361. .

  Thereafter, in step 604, the comparison unit 361 notifies a comparison result indicating that the total output power value and the target power value are the same. In this case, the adjustment unit 362 ends the adjustment of the output power by the power generation devices F1 to Fn.

  Further, when the total output power value and the target power value are the same, in step 605, the adjustment order setting unit 33 adjusts the output power to the power generator Fj that has adjusted the output power when the target power value is reached. No. 1 is newly assigned.

  Further, in step 606, the adjustment order setting unit 33 determines the current output adjustment direction and the previous output adjustment direction based on the comparison result between the first magnitude relationship and the second magnitude relationship by the increase / decrease comparison unit 331. Identifies whether they are in the same direction or in the opposite direction. Then, the adjustment order setting unit 33 sets the order of the power generation device Fj newly set to No. 1 to each power generation device other than the power generation device Fj according to the identified previous and current output adjustment directions. Grant again.

  If it is determined in step 606 that the current output adjustment direction and the previous output adjustment direction are the same direction, in step 607, the adjustment order setting unit 33 starts the power generator Fj that is newly set to the first one. The order is given according to the same direction as the previous adjustment order.

  On the other hand, if it is determined in step 606 that the current output adjustment direction and the previous output adjustment direction are opposite, in step 608, the adjustment order setting unit 33 newly sets the power generation device Fj set to No. 1. The order is given in the direction opposite to the previous adjustment order.

  This completes a series of operations in which the monitoring device 3 causes the power generation devices F1 to Fn to adjust the output power so that the total output power value and the target power value are the same.

In the setting example of the allowable output adjustment range illustrated in FIG. 5, the zone including the region where the maximum output power is output is set as the first allowable output adjustment range P _j1 , and the jth is given as the initial value of the order. The allowable power adjustment range P _jk is set so as to reduce the output power as the zone number k of the allowable power adjustment range P _jk used by the generated power generation device Fj in the k-th output power adjustment increases.

Therefore, when the storage unit 35 stores the zone number k and the allowable output adjustment range P _jk in association with each other, and the adjustment unit 362 decreases the output power to the power generation device Fj, the zone number k is sequentially increased. Thus, the allowable output adjustment range P _jk in the storage unit 35 may be designated. Further, when increasing the output power to the power generation device Fj, the adjustment unit 362 may specify the allowable output adjustment range P _jk in the storage unit 35 by sequentially decreasing the zone number k.

When the adjustment unit 362 designates the allowable output adjustment range P _jk in the storage unit 35 using the zone number k illustrated in FIG. 5, the process of step 603 illustrated in FIG. 9 is performed in step 701 illustrated in FIG. 10. It is also possible to realize by the processing of ˜708.

In the operation example shown in FIG. 10, first, in step 701, the adjustment unit 362 specifies the power generation apparatus assigned number 1 as the order j and specifies k as the zone number. Subsequently, in step 702, the adjustment unit 362 causes the power generation device assigned the j-th order to adjust the output power within the allowable output adjustment range P _jk stored in association with the zone number k. .

  Thereafter, when the adjustment unit 362 identifies that the comparison result from the comparison unit 361 indicates that the total output power value and the target power value are different in step 604 illustrated in FIG. 9, the step illustrated in FIG. At 703, it is determined whether or not the order j of the power generators that have adjusted the output power is smaller than the total number n of power generators.

  When it is determined that the order j is smaller than the total number n, this corresponds to the case where all of the power generation devices F1 to Fn have not completed the k-th output power adjustment. In this case, in step 704, the adjustment unit 362 adds 1 to the current order j and designates the next power generation apparatus.

  On the other hand, if it is determined in step 703 that the order j is not smaller than the total number n, this corresponds to the case where all of the power generators F1 to Fn have completed the k-th output power adjustment. In this case, in step 705, the adjustment unit 362 sets j = 1. Subsequently, in step 706, the adjustment unit 362 determines whether or not the direction in which the power generation apparatus adjusts the output power is a direction in which the output power is increased.

If it is determined that the power generation device Fj is not in the direction of increasing the output power, in step 707, the adjustment unit 362 changes the zone number k in the direction of increasing sequentially, thereby allowing an allowable output adjustment range corresponding to the zone number k. Specify P _jk .

On the other hand, if it is determined in step 706 that the output power is to be increased by the power generation device Fj, in step 708, the adjustment unit 362 sequentially decreases the zone number k, thereby allowing the tolerance corresponding to the zone number k. Specify the output adjustment range P _jk . Then, the adjustment unit 362 causes each of the power generation devices F1 to Fn to repeatedly execute the above-described operation until a comparison result indicating that the total output power value and the target power value are the same is notified from the comparison unit 361. .

As described above, according to the present invention, the power demand monitoring device 3 adjusts the output power of each power generation device Fj (that is, the increase or decrease of the output power), the order of each power generation device, and the tolerance. Based on the output adjustment range P _jk , each power generator Fj adjusts the output power. Therefore, output control of a plurality of power generators can be performed easily and easily. In addition, it is not necessary to provide a complicated output command system having a complicated output setting algorithm and communication, and it is possible to reduce costs.

  Various modifications can be made without departing from the scope of the present invention.

The monitoring device 3 only monitors the load power, the received power, and the output power of each of the power generation devices F1 to Fn, and each of the power generation devices F1 to Fn sets the initial value of the order and the allowable output adjustment range P _jk . The resetting of the order may be performed independently.

  Although the present invention has been described with reference to the embodiment, the present invention is not limited to the above embodiment. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Electric power system 2 Distribution equipment 3 Electric power demand monitoring apparatus 31 Measurement part 32 Target value setting part 33 Adjustment order setting part 331 Increase / decrease comparison part 34 Adjustment range setting part 35 Storage part 36 Output control part 361 Comparison part 362 Adjustment part 4 Communication network 5 Power load group 5
F1 to Fn power generator

Claims (8)

A power generation output adjustment method for adjusting output power of the plurality of power generation devices among a power system and a plurality of power generation devices for supplying power to a power load group,
Processing for calculating the total output power of the plurality of power generation devices;
A process of calculating a target power value that is a power value obtained by subtracting the received power supplied from the power system from the load power consumed by the power load group;
A process of comparing the total and the target power value;
As a result of the comparison, if the total and the target power value are different, adjustments given to the plurality of power generation devices according to a preset order until the total and the target power value become the same value, respectively. And a power generation output adjustment method comprising: adjusting processing for sequentially adjusting the output power of the power generation device by the amount. The power generation output adjustment method according to claim 1,
The adjustment process adjusts the output power using a plurality of zones obtained by dividing between the maximum value and the minimum value of the output power that can be generated by each of the plurality of power generation devices as the adjustment amount. A power generation output adjusting method characterized by the above. In the power generation output adjustment method according to claim 1 or 2,
An adjustment sequence setting process for setting the power generation device that has adjusted the output power to the power generation device that first adjusts the next output power when the total and the target power value become the same value; Power generation output adjustment method. In the power generation output adjustment method according to claim 3,
The target power before the total and the target power value become the same value when the total and the target power value become different values after the total and the target power value become the same value. A process of comparing the first magnitude relationship of the sum with respect to a value and the second magnitude relationship of the sum with respect to the target power value when the different values are obtained,
In the adjustment order setting process, if the first magnitude relation and the second magnitude relation are different as a result of the comparison, the order is reset to the reverse order. Among the power system and the plurality of power generation devices that supply power to the power load group, the power generation output adjustment device that adjusts the output power of the plurality of power generation devices,
A storage unit for storing the order of the power generation devices for adjusting the output power, and the adjustment amount of the output power given to each of the plurality of power generation devices;
A measuring unit for calculating the total output power of the plurality of power generation devices;
A target value setting unit that calculates a target power value that is a power value obtained by subtracting the received power supplied from the power system from the load power consumed by the power load group;
A comparison unit for comparing the total with the target power value;
As a result of the comparison, when the total and the target power value are different, the total and the target power value are stored in the storage unit in the order stored in the storage unit until the total and the target power value become the same value. A power generation output adjustment device including an adjustment unit that sequentially adjusts the output power of the power generation device by an adjustment amount. In the power generation output adjustment device according to claim 5,
The storage unit stores, as the adjustment amount, a plurality of zones obtained by dividing between a maximum value and a minimum value of the output power that can be generated by each of the plurality of power generation devices. Power generation output adjustment device. In the power generation output adjustment device according to claim 5 or 6,
An adjustment sequence setting unit configured to set the power generation device that has adjusted the output power to the power generation device that first adjusts the next output power when the total and the target power value are equal to each other; Power generation output adjustment device. The power generation output adjustment device according to claim 7,
The target power before the total and the target power value become the same value when the total and the target power value become different values after the total and the target power value become the same value. An increase / decrease comparison unit that compares the first magnitude relationship of the sum with respect to a value and the second magnitude relationship of the sum with respect to the target power value when the different values are obtained;
The adjustment order setting unit rewrites the order stored in the storage unit to the reverse order when the first magnitude relationship and the second magnitude relationship are different as a result of the comparison in the increase / decrease comparison unit. A power generation output adjusting device characterized by the above.

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