JP6114068B2 - Current sensor detection method - Google Patents

Description

  The present invention relates to a current sensor detection method for detecting the position of a current sensor attached to a power control system.

  In recent years, a power control system combining a solar cell device and a power storage device has been popularized. In such a power control system, surplus power that is supplied by supplying power to the load among the generated power of the solar battery device can be stored in the power storage device, or can be sold by flowing backward to the power system.

  There are the following two control methods for controlling the power control system. In the first control method, the power consumption of the load is preferentially provided from the power storage device, and the power generation amount of the solar cell device is positively reversed to increase the ratio of the amount of power sold, thereby increasing the “push-up effect”. What is obtained (hereinafter referred to as push-up control). In the second control method, there is no “push-up effect” in which the power generation power of the solar cell device is insufficient from the power consumption of the load from the power storage device (hereinafter referred to as “no push-up control”). )

  In such a power control system, a plurality of current sensors are provided as necessary. For example, the power control system shown in FIG. 1 includes a current sensor C that measures a discharge / charge current and a current sensor D that measures an output current of the solar cell device. Further, in the power control system, when the control with the push-up is performed, a current sensor A for measuring the power consumption of the load is provided. Further, in the power control system, when the control without push-up is performed, a current sensor B that measures a current in the power selling direction to the power system side is provided instead of the current sensor A.

  Moreover, since the current sensor has a polarity, it may be applied in a state where the polarity is reversed. Thus, a method has been proposed in which current information is corrected correctly at the time of calculation when the polarity of the current sensor is incorrect (see, for example, Patent Document 1 and Patent Document 2).

JP 2004-297959 A JP-A-11-225441

  In the power control system, whether to perform the operation with the push-up control or the control without the push-up must be determined in advance on the system. Therefore, it is necessary to arrange the current sensor in accordance with the above control method. However, since many wirings are gathered in the distribution board, there may be a construction error that causes the current sensor to be misplaced. When such a construction error occurs, the power control system cannot operate normally based on a predetermined control method. However, the techniques disclosed in Patent Documents 1 and 2 have not been able to detect even the incorrect placement of the current sensor.

  An object of the present invention is to provide a current sensor detection method for detecting the position of the current sensor and causing the system to operate normally according to a desired control method.

A current sensor detection method according to an embodiment of the present invention is attached to a first power line that connects a power system and a distribution board or a second power line that connects the distribution board and a load. In addition, a current sensor that detects the direction of current flowing through the power line, and a solar cell that transmits generated power to the first power line or the second power line via a third power line connected to the distribution board In a power control system comprising a device and a power storage device that transmits power to the second power line via a fourth power line connected to the distribution board, when a current flows through the current sensor It is detected which of the first power line and the second power line is attached. Further, in the present embodiment, the step A for obtaining a first measurement value by measuring at least one of a current value and a power value flowing through the power line in a state where there is no generated power of the solar cell device; And a step B of measuring at least one of a current value and a power value flowing through the power line in a state where the generated power of the solar cell device is output and obtaining a second measured value. Furthermore, in this embodiment, after the step B, the direction of the current flowing through the power line is such that the first power line and the second power line are directed from the power system to the load via the distribution board. Step C for determining whether the first direction is a flowing direction or a second direction opposite to the first direction, and the current direction determined in Step C is the first direction. A step D for measuring a variation value of the second measurement value from a value, a step E for determining a position of the current sensor based on the variation value, and a position of the current sensor determined in the step E, Step F for collating with a predetermined control method, and the predetermined control method is a control with push-up or a control without push-up .

  According to the current sensor detection method according to the embodiment of the present invention, it is possible to detect whether the current sensor is provided in the first power line or the second power line. Thereby, it can be confirmed whether the current sensor is attached to the desired power line. As a result, according to the present embodiment, the power control system can be normally operated according to the control method to be set in advance.

It is a block diagram which shows one structure of an electric power control system. It is a wiring diagram explaining the position where the current sensor with which an electric power control system is equipped is arrange | positioned, and is a wiring diagram which shows the direction of each electric current when there is no generated electric power of a solar cell apparatus. It is a wiring diagram explaining the position where the current sensor with which an electric power control system is equipped is arrange | positioned, and is a wiring diagram which shows the direction of each electric current from which the generated electric power of a solar cell apparatus is output. It is a control flowchart for demonstrating the current sensor detection method which concerns on Embodiment 1 of this invention. It is a control flowchart for demonstrating the current sensor detection method which concerns on Embodiment 2 of this invention. It is a control flowchart for demonstrating the current sensor detection method which concerns on Embodiment 3 of this invention.

  The current sensor detection method of the present invention will be described with reference to the drawings. In addition, the description which overlaps with background art is abbreviate | omitted.

(Configuration of power control system X)
As shown in FIG. 1, the power control system X includes a power storage device 1, a solar cell device 2, and a control device 3. Moreover, in the following description, as shown in FIG. 2, the power transmission line connecting between the distribution board 4 and the commercial power system (hereinafter, power system 5) is the first power line L1, the distribution board 4 and The power transmission line connecting the load 6 is the second power line L2, the power transmission line connecting the distribution board 4 and the solar cell device 2 is the third power line L3, the distribution board 4 and the power storage device 1 A power transmission line connecting the two is referred to as a fourth power line L4.

  The power control system X is provided with a plurality of current sensors. As shown in FIG. 1, the current sensor A measures the direction of current flowing through the second power line L2. The current sensor B measures the direction of current flowing through the first power line L1. The current sensor C measures the direction of current flowing through the fourth power line L4. The current sensor D measures the direction of current flowing through the third power line L3. As such current sensors A to D, for example, a Hall current sensor using a magnetic transducer or a magnetic coil current sensor is used.

  The power storage device 1 is for a storage battery 10 that stores DC power, and for a power storage device that converts AC power into DC power so that the storage battery 10 can be charged, or converts the DC output of the storage battery 10 into AC output. Power conditioner 11.

  Since the power storage device 1 can be charged with electric power at nighttime, power purchase from the electric power system 5 during the daytime can be reduced by supplying the charged electric power to the load 6 during the daytime. As a result, if the power storage device 1 is provided, it is possible to reduce power purchase during daytime peak power, thus reducing the burden on the power company and reducing the contract power and keeping the electricity bill low. Become. Moreover, since the electrical storage apparatus 1 can supply electric power to the load 6 at night etc. when there is no power generation of the solar cell apparatus 2, it can be used as an emergency power source even during a power failure due to a disaster or the like.

  The solar cell device 2 includes a solar cell 20 in which a plurality of solar cell modules are electrically connected in series, and a power conditioner 21 that converts the generated power of the solar cell 20 into AC power. The AC power output from the power conditioner 21 can be transmitted to the power system 5 or the load 6 via the distribution board 4 and the power line, respectively.

  The control device 3 performs an operation based on the current information (current direction and current value) measured by the current sensor, and when the current sensor is attached to the first power line L1 or the second power line L2. , And a function for detecting in which line the current sensor is located. Specifically, the control device 3 has measured values (first measured value and first measured value) of each current value measured by the current sensor in a state where the generated power of the solar cell device 2 is output and a state where the generated power is not output. Detection means for detecting a variation value between the first measurement value and the second measurement value. In addition, the control device 3 includes a determination unit that determines the direction of the current measured by the current sensor. And the control apparatus 3 can detect which electric power line (1st electric power line or 2nd electric power line) is arrange | positioned by calculating the result of these detection means and determination means. A specific detection method will be described later.

  In the present embodiment, the control device 3 also controls the power storage device 1. Specifically, the control device 3 can perform calculation based on information on the current measured by the current sensor C, and obtain information such as the output power from the storage battery 10 or the power used for charging. The control mechanism of the control device 3 is performed by a calculation unit such as a CPU provided inside. This calculation unit may have a function of controlling the power conditioner 11.

  The distribution board 4 has a plurality of breakers and terminal blocks. In addition, the distribution board 4 is configured to open and close the electric circuit with a breaker installed between the solar cell device 2, the power system 5 and the load 6. Thereby, the distribution board 4 can supply electric power generated by the solar cell device 2 to the power storage device 1, the power system 5, and the load 6 through each power line. In addition, although the electrical storage apparatus 1 may be connected within the distribution board 4, as shown in FIG. 2, the distribution board 4 may be provided so that an electric circuit can be opened and closed with a breaker.

The power control system X is a system that alternately performs power sale for transmitting the generated power of the solar cell device 2 to the power system 5 and power purchase for transmitting power consumption from the power system 5 to the load 6.

  The power control system X may be provided with the display device 7. The display device 7 can display information such as the amount of power sold by the solar cell device 2 and the amount of power consumed by the load 6 (amount of power purchased). Such information is calculated as a power value from the current information obtained by the current sensor E by arranging the current sensor E between the distribution board 4 and the power system 5.

  Next, a current sensor detection method in the power control system X will be described.

(Embodiment 1)
FIGS. 2 and 3 are wiring diagrams schematically showing the arrangement of each current sensor in the case of control with push-up and the control without push-up of the power control system X. FIG. Here, FIG. 2 shows the direction of current flow in each current sensor when there is no power generated by the solar cell device 2. In addition, in this embodiment, when there is no generated electric power of the solar cell apparatus 2, the state where the generated electric power was not output from the power conditioner 21 as alternating current power in the solar cell apparatus 2 is shown. Therefore, even if the solar cell 20 generates power with weak sunlight, if it is not output from the power conditioner 21, it is considered that there is no generated power. FIG. 3 shows the direction of current flow in each current sensor when there is generated power. In FIG. 3, when the generated power is present, it means that the generated power is output as AC power from the power conditioner 21 in the solar cell device 2.

  The output of the power storage device 1 in the power control system X is a single-phase three-wire system, and current sensors are arranged at two locations of the U phase and the W phase among the three phases of the U phase, the V phase, and the W phase. Here, in the case of the control with push-up, the current sensor is located at positions A1 and A2 between the distribution board 4 and the load 6. This calculates the total power consumption of a plurality of loads from the current value measured by the current sensor, and supplies the same amount of power from the power storage device 1 to the load side, thereby generating the power generated by the solar power generation device 2. This is because all power needs to be sold. On the other hand, in the case of the control without push-up, the current sensor is at the positions B1 and B2. This is for confirming whether reverse power flow from the power storage device 1 has occurred while confirming whether the power supplied from the solar cell device 2 is equal to or greater than the total power consumption of the load.

  Here, in the state shown in FIG. 2, in the current sensors located at A1, A2, B1, and B2, the first direction in which the current flows through the power line from the power system 5 to the load 6 through the distribution board 4 (buy) It can be confirmed that it flows only in the electric direction. On the other hand, in the state of FIG. 3, the current sensors positioned at B1 and B2 have a current flowing in both the first direction (the power purchase direction) and the second direction (the power sale direction) opposite to the first direction. It can be confirmed that it is flowing. Further, when current sensors are arranged at B1 and B2, the current value changes depending on the presence or absence of the generated power of the solar cell device 2. Therefore, in the present embodiment, the position of the current sensor is detected by utilizing the fact that the current direction and the current value are different at positions A1 and A2 and B1 and B2. In the present embodiment, the current value is measured, but the position of the current sensor may be detected using a power value calculated from the current value. Therefore, in this embodiment, it is only necessary to detect at least one of the current value and the power value.

  FIG. 4 is a control flowchart for detecting which side of the current sensor A1 or B1 (A2 or B2) in FIGS. 2 and 3 is located. Control based on this control flowchart is performed by the control device 3. In the following description, for the sake of convenience, for the current sensor whose arrangement has not been determined, the U phase side where the current sensor A1 or B1 is placed is the current sensor 1, and the W phase side where the current sensor A2 or B2 is placed is the current sensor 2. I will call it.

  First, in STEP 1, it is determined whether or not the generated power of the solar cell device 2 is output to the power system 5 and the load 6. That is, in STEP1, the presence or absence of the generated power of the solar cell device 2 is confirmed. The presence or absence of generated power can be determined by the presence or absence of a current value measured by the current sensor D. Then, the determination result is sent to the storage unit of the control device 3.

  Here, the generated power of the solar cell device 2 in the present embodiment refers to the output from the power conditioner 21 as the AC power that can be used by the load 6 or the like from the DC power generated by the solar cell 20. Therefore, the state where there is no power generated by the solar cell device 2 refers to a state where the solar cell 20 is not generating power or a state where the power conditioner 21 is stopped. In the present embodiment, even if the solar cell 20 generates power with weak sunlight, even if it is not output from the power conditioner 21, it is considered that there is no generated power.

  In addition, the case where there is no power generation of the solar cell apparatus 2 is after sunset, for example. Moreover, in this embodiment, you may use the method of turning off the drive switch of the power conditioner 21 of the solar cell apparatus 20, and eliminating generated electric power by human work. Thereby, compared with natural phenomena, such as sunset, the determination time in STEP1 can also be shortened.

  And the control apparatus 3 performs control which does not advance to STEP2 until the state with no generated electric power can be detected, when the generated electric power has generate | occur | produced in the solar cell apparatus 2. FIG. On the other hand, the control device 3 performs the measurement process of the current value of STEP2 when the generated power of the solar cell device 2 cannot be detected by the current sensor D within a predetermined time, that is, when there is no generated power. The predetermined time is, for example, about 30 seconds to 5 minutes.

  Next, in STEP 2, the current value of at least one of the current sensor 1 and the current sensor 2 is measured. In STEP2, the control device 3 acquires the current value as the first measurement value and stores it in the storage unit. A combination of STEP 1 and STEP 2 is also referred to as Step A.

  Next, in STEP 3, as in STEP 1, the presence or absence of output of the generated power of the solar cell device 2 is determined. Specifically, STEP 1 and STEP 2 are performed after sunset, and STEP 3 is performed after sunrise when sunlight is generated.

  In STEP 3, when there is no generated power of the solar battery device 2, the control device 3 performs control that does not proceed to STEP 4 until the generated power can be detected. On the other hand, when the generated power of the solar cell device 2 can be detected by the current sensor D within a predetermined time, the control device 3 performs the current direction and current value measurement processing in STEP 4. The predetermined time is, for example, about 10 seconds to 1 minute.

  Next, in STEP 4, the current value and direction of at least one of the current sensor 1 and the current sensor 2 are measured. In STEP 4, the control device 3 acquires the current value as the second measurement value and stores it in the storage unit. The control device 3 also stores the direction of the current detected by the current sensor obtained in STEP 4 in the storage unit. A combination of STEP 3 and STEP 4 is also referred to as Step B.

  Next, in STEP 5 (Step C), it is determined whether or not the direction of the current measured in STEP 4 is the first direction. In STEP 5, when it is determined that the direction of the current is the first direction, the control device 3 performs a process of proceeding to STEP 6. On the other hand, in STEP 5, when it is determined that the current direction is not the first direction, that is, the current direction is the second direction, the control device 3 performs the process of proceeding to STEP 7.

  Here, when it progresses to STEP7, in STEP7, it determines with the current sensor 1 and the current sensor 2 being the position of B1 and B2. This is based on the fact that no current flowing in the second direction is detected when current sensors are arranged at positions A1 and A2. That is, when it is detected that a current flows in the second direction, it can be determined that the current sensors are located at B1 and B2.

  On the other hand, when proceeding to STEP 6, in STEP 6, the first measurement value acquired in STEP 2 is compared with the second measurement value acquired in STEP 4, and the variation value is measured. Specifically, the control device 3 detects whether or not the second measurement value is decreased from the first measurement value. At this time, the decrease in the second measurement value may occur when a current flows from the solar cell device 2 to the second power line L2 in STEP4. That is, the decrease in the second measurement value from the first measurement value means that the current flowing in the first direction from the power system 5 when the generated power of the solar cell device 2 is supplied to the load in the first power line L1. A decrease in the amount is detected. As described above, when a decrease in the second measurement value with respect to the first measurement value is detected, it is determined that the current sensor is disposed at the positions B1 and B2 (STEP 8).

  In addition, when a decrease in the second measurement value with respect to the first measurement value is not detected within a predetermined time, for example, when the first measurement value and the second measurement value are substantially equivalent values, the first power line This means that a decrease in the current flowing in the first direction of L1 was not detected. Moreover, since the change which does not arise in the electric current which flows through the 2nd electric power line L2 with the generated electric power output from the solar cell apparatus 2, when the fall of the 2nd measured value with respect to a 1st measured value is not detected, A1 and A2 It is determined that the current sensor is disposed at the position (STEP 9). Here, the predetermined time is, for example, 1 second to 10 seconds.

  Next, the result determined in any one of STEP 7, STEP 8, and STEP 9 is collated with a control method (control with push-up or control without push-up) determined in advance by the power control system X (STEP 10). This collation is performed by collation means provided in the control device 3. In addition, such a collation means is provided with the memory | storage part which memorize | stores the information which shows that it is a specification of control with push-up and control without push-up, CPU for calculating this information, etc., for example.

  In STEP 10, when the power control system X is set with the control with push-up, if the result from STEP 9 is received, the current sensor is arranged at the correct position. In STEP 10, if the power control system X is set with no push-up control, if the result from STEP 7 or STEP 8 is received, the current sensor is placed at the correct position.

  On the other hand, if it is determined in STEP 10 that the current sensor is arranged at a position different from the control method set in the power control system X, the determination information is transmitted to the control means provided in the control device 3. To do. This control means has a program for making a warning sound or a warning display in order to transmit a misplacement of the current sensor to the user.

  Thus, in the present embodiment, it is possible to detect whether or not the current arrangement of current sensors is correct in a system that performs desired control. Thereby, even if a builder performs construction of the current sensor by mistake, it is possible to perform an operation to correct the placement of the current sensor.

(Embodiment 2)
In this embodiment, the flow after STEP 6 is different from that in the first embodiment. Specifically, in the present embodiment, as shown in FIG. 5, the current determined in STEP 6 according to the presence / absence of a fluctuation value between the first measurement value and the second measurement value (whether or not the second measurement value is decreased). Storing the position of the sensor.

  In STEP 11, when a change is detected in STEP 6, the control device 3 stores in the storage unit that the current sensor is at the positions B 1 and B 2.

  Next, the control device 3 determines whether or not the variation value obtained in STEP 11 is detected as the same result within a predetermined time, and performs processing according to the determination result (STEP 12). In STEP 12, the control device 3 has the same value continuously obtained within a predetermined time by a plurality of fluctuation values measured by performing steps including STEP 4 to STEP 6 (step B, step C, and step D) at least twice. The above steps are repeated until the fluctuation value is reached. What is necessary is just to repeat the said step 2-5 times continuously within the predetermined time of about 1 second-1 minute, for example. Then, if the same fluctuation value can be obtained continuously, the control device 3 proceeds to STEP 16 and determines that the current sensor is disposed at the positions B1 and B2.

  On the other hand, in STEP13, the control apparatus 3 memorize | stores in a memory | storage part that a current sensor exists in the position of A1 and A2, when a fluctuation | variation is not detected by STEP6.

  Next, the control device 3 determines whether or not the fluctuation value obtained in STEP 13 is detected as the same result within a predetermined time, and performs processing according to the determination result (STEP 14). In STEP 14, the control device 3 determines that the plurality of variation values measured by performing the steps including STEP 4 to STEP 6 (step B, step C, and step D) at least twice are continuously the same value within a predetermined time. The above steps are repeated until the fluctuation value is reached. What is necessary is just to repeat the said step 2-5 times continuously within the predetermined time of about 1 second-1 minute, for example. Then, if the same variation value can be obtained continuously, the control device 3 proceeds to STEP 15 and determines that the current sensor is disposed at the positions of A1 and A2.

  Finally, the result determined in any one of STEP7, STEP15, and STEP16 is transmitted to the user as in the first embodiment.

  As described above, the present embodiment includes a step of confirming that the variation values of the first measurement value and the second measurement value are the same result continuously within a predetermined time. Thereby, in this embodiment, the conditions regarding the power consumption of a load can be eased compared with Embodiment 1 which can be implemented with the power consumption of a load substantially constant. Specifically, in the present embodiment, the position of the current sensor can be accurately detected even when a slight fluctuation occurs in the power consumption of the load when measuring the current of the second measurement value in STEP4. it can. That is, in this embodiment, since the position of the current sensor is determined after the fluctuation value reaches a steady state, erroneous determination is reduced.

  In the present embodiment, when the position of the current sensor is detected while the power consumption of the load fluctuates relatively greatly in a short time, STEP 1 to STEP 6 (Step A, Step B, Step C and Step D) are performed. You may perform control which repeats the said step until the several fluctuation value measured by performing the including step at least twice or more becomes the same value (fluctuation value) continuously within a predetermined time. Thereby, the erroneous determination of the position detection of the current sensor is further reduced.

(Embodiment 3)
The present embodiment is different from the first embodiment in that it includes a flow for detecting a misplacement of the direction of the current sensor. Specifically, in this embodiment, as shown in FIG. 6, STEP 2 of Embodiment 1 is replaced with STEP 22 to STEP 27 and STEP 3 of Embodiment 1 is replaced with STEP 28. In this embodiment, STEP 21 corresponds to STEP 1 of Embodiment 1,
STEP 29 to STEP 35 correspond to STEP 4 to STEP 10 of the first embodiment. Therefore, description of STEP21 and STEP29-STEP35 is abbreviate | omitted.

  In STEP 22, the direction and current value of the current flowing in the current line are measured by the current sensor 1 in a state where there is no power generated by the solar cell device 2.

  Next, in STEP 23, it is determined whether or not the direction of the current acquired by the current sensor 1 is the first direction. Here, when it is determined that the direction of the current is the second direction, a process of converting the direction of the current to the first direction is performed (STEP 24). The current sensor has a function of outputting a negative numerical value when a current in the opposite direction flows when outputting a current value. Therefore, if the current sensor is arranged to output a positive numerical value when a current flows in the first direction, the current sensor outputs a negative numerical value when a current flows in the second direction. Here, in STEP23, when a negative numerical value is measured, even if it is a negative numerical value in STEP24, it is handled as if the determination was in the first direction. In such a conversion process, the negative value obtained in STEP 22 may be forcibly converted to a positive value by the control device 3. By this conversion processing, the direction of the current determined by the current sensor 1 becomes the first direction. If it is determined in STEP 23 that the current direction is the first direction, the process proceeds to STEP 25.

  Next, in STEP 25, it is determined whether or not the direction of the current acquired by the current sensor 2 is the first direction. Here, when it is determined that the direction of the current is the second direction, a process of converting the direction of the current to the first direction is performed. This conversion process may be the same process as STEP24. If it is determined in STEP 26 that the current direction is the first direction, the process proceeds to STEP 28.

  Next, in STEP 28, as in STEP 21, the presence or absence of output of the generated power of the solar cell device 2 is determined. In STEP 28, when there is no generated power of the solar cell device 2, the control device 3 performs control that does not proceed to STEP 29 until the generated power can be detected by the current sensor D. Therefore, the control device 3 performs control so that the steps of STEP22 to STEP27 are repeated until the generated power can be detected by the current sensor D.

  Thus, in this embodiment, when the direction of the current flowing through the power line is determined to be the second direction in a state where there is no generated power of the solar cell device 2, the direction of the current is converted to the first direction. It has a step (step E) for performing control. Normally, when there is no generated power from the solar cell device 2, the current flows only in the first direction regardless of the position of the current sensor A1, A2, B1, or B2. Thereby, when the direction of the current is determined as the second direction, it is understood that the polarity of the current sensor is reversed. As a result, in this embodiment, in addition to determining whether the current sensor is disposed correctly, it is possible to detect and correct an error in the polarity (installation direction) of the current sensor. Thereby, for example, the amount of power sold detected by the current sensor B can be correctly transmitted to the user.

(Modification)
In the said embodiment, although the presence or absence of the generated electric power of the solar cell apparatus 2 utilizes the solar cycle of 1 day, for example, it is not restricted to this. For example, STEP 1 and STEP 21 may be realized by controlling the control device 3 to force the generated power of the solar cell device 2 to zero. Thereby, STEP1 and STEP21 can be completed in a relatively short time. As such a control method, for example, even when the solar cell 20 is generating power, control may be performed so that generated power is not output to the power line L3. As another control method, a part of the electric circuit may be opened using a relay or a semiconductor switch.

In addition, all or a part of each of the above-described embodiment and various modifications is appropriately configured as appropriate.
Needless to say, they can be combined within a consistent range.

X: Power control system 1: Power storage device 2: Solar cell device 3: Control device 4: Distribution board 5: Power system 6: Load 7: Display device 10: Storage battery 20: Solar cell 11, 21: Power conditioner A to E: Current sensors L1 to L4: First to fourth power lines

Claims (3)

A current sensor for detecting a direction of a current flowing through the power line, which is attached to a first power line connecting between the power system and the distribution board or a second power line connecting between the distribution board and the load. When,
A solar cell device that transmits generated power to the first power line or the second power line via a third power line connected to the distribution board;
In a power control system comprising a power storage device that transmits power to the second power line via a fourth power line connected to the distribution board,
A current sensor detection method for detecting whether the current sensor is attached to the first power line or the second power line when current is measured by the current sensor,
Measuring at least one of a current value and a power value flowing through the power line in the absence of the generated power of the solar cell device to obtain a first measurement value; and
A step B of measuring at least one of a current value and a power value flowing through the power line in a state where the generated power of the solar cell device is output, and obtaining a second measured value;
After the step B, the direction of current flowing through the power line is a first direction flowing through the first power line and the second power line from the power system to the load via the distribution board, or Step C for determining whether the second direction is opposite to the first direction;
A step D of measuring a variation value of the second measurement value from the first measurement value when the current direction determined in the step C is the first direction;
Determining the position of the current sensor based on the variation value; and
Step F for collating the position of the current sensor determined in Step E with a predetermined control method ,
The current sensor detection method , wherein the predetermined control method is control with push-up or control without push-up .   The step is repeated until a plurality of variation values measured by performing the step including the step B, the step C, and the step D at least twice are continuously the same value within a predetermined time. The current sensor detection method according to 1.   The step A further comprises a step E of reversing the polarity of the current sensor when the direction of the current flowing through the power line is determined and the direction of the current flowing through the power line is determined to be the second direction. The current sensor detection method according to claim 1.

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