JPWO2020064169A5 - - Google Patents

Claims (12)

It is a method for identifying the assignment of the phase lines (L1, L2, L3) of the distribution grid (3) to the connection portion (U, V, W) of the electric device (1) capable of unbalanced load operation. In a method in which the device (1) is connected to a plurality of phase lines (L1, L2, L3) of the distribution grid (3).
-A step of setting target parameters (20a, 20b, 20c) assigned to an unbalanced load profile at the connection (U, V, W) of the electrical device (1), wherein the target parameters (20a, 20b) are set. , 20c), the characteristic signal formats set in the connection portion (U, V, W) of the device (1) capable of unbalanced load operation have a shape that can be distinguished from each other, and the above-mentioned A setting that exists within the measurement parameters (21a, 21b, 21c) detected on the phase lines (L1, L2, L3) in temporal correlation with the target parameters (20a, 20b, 20c). Steps to do and
-Using the detection unit (2), the measurement parameters (21a, 21b, 21c), in particular, the measurement parameters (21a, 21b, 21c) in each of the plurality of phase lines (L1, L2, L3) are temporal. Steps to discover the profile and
-A step of comparing the detected measurement parameters (21a, 21b, 21c) with the target parameters (20a, 20b, 20c) of the unbalanced load profile.
-A step of identifying the allocation of the phase lines (L1, L2, L3) to the connection (U, V, W) based on the comparison.
How to include. The first aspect of claim 1, wherein the start of the setting of the target parameters (20a, 20b, 20c) of the unbalanced load profile-and optionally the end-is signaled by the electrical device (1). the method of. The target parameters (20a, 20b, 20c) and / or the measurement parameters (21a, 21b, 21c) are of electrical properties, respectively, and the current I (t), the voltage U (t), and the electric power. The method according to claim 1 or 2, wherein P (t) and / or a phase difference φ between the current I (t) and the voltage U (t) is included. Based on the comparison, it comprises signaling the correct or incorrect allocation of the phase lines (L1, L2, L3) to the respective connections (U, V, W). The method according to any one of claims 1 to 3. The invention according to any one of claims 1 to 4, wherein the target parameters (20a, 20b, 20c) of the unbalanced load profile are set during the normal operation of the device (1). the method of. Claimed, wherein the target parameters (20a, 20b, 20c) of the unbalanced load profile are predefined by the device (1) itself or by a controller connected to the device (1). Item 5. The method according to any one of Items 1 to 5. The incorrect allocation of the phase lines (L1, L2, L3) to the connection (U, V, W) is connected to the device (1) either by software modification of the device (1) itself or to the device (1). The method according to any one of claims 1 to 6, wherein the method is supported by changing the software of the controller. The target parameters (20a, 20b, 20c) of the unbalanced load profile do not change over time within a period Δt of at least 30 seconds, but have different current amplitudes between the connections (U, V, W). The method according to any one of claims 1 to 7, wherein the method is characterized by the above. Electrical variables are measured at the connection (U, V, W) of the electrical device (1) and, in some cases, transmitted and taken into account when confirming the target parameters (20a, 20b, 20c). The method according to any one of claims 1 to 8, wherein the method is characterized by the above-mentioned method. A device (10) for identifying the assignment of the phase lines (L1, L2, L3) of the distribution grid (3) to the connection portion (U, V, W) of the electric device (1) capable of unbalanced load operation. ) And
A detection unit (2) for detecting measurement parameters (21a, 21b, 21c) at each of the plurality of phase lines (L1, L2, L3) of the distribution grid (3) to which the device (1) is connected. ) And at the same time
Control unit (5) and
In the evaluation unit (4) connected to the control unit, the measurement parameters (21a, 21b, 21c) detected on the phase lines (L1, L2, L3) are set to the target parameters (20a, 20b, 20c), an evaluation for comparison with the target parameters (20a, 20b, 20c) set in the connection (U, V, W) of the device (1) and assigned to the unbalanced load profile. In the device comprising the unit (4) and
The characteristic signal formats set in the connection (U, V, W) of the device (1) capable of unbalanced load operation via the target parameters (20a, 20b, 20c) can be distinguished from each other. Within the measurement parameters (21a, 21b, 21c) detected on the phase lines (L1, L2, L3), which are shapes and temporally correlate with the target parameters (20a, 20b, 20c). Exists and
The method according to any one of claims 1 to 9, wherein the device (10) connected to the detection unit (2) is connected to the device (1) for control and data exchange. A device (10) that is designed to perform. An electrical device (1) capable of unbalanced load operation, the plurality of connections (U) via to enable connection to a large number of phase lines (L1, L2, L3) of the distribution grid (3). , V, W) for identifying the allocation of the phase lines (L1, L2, L3) of the distribution grid (3) to the connection (U, V, W) in the device (1). An electrical device (1) comprising or being connected to the device (10) according to claim 10. The following device classes, ie
-Energy delivery devices, especially photovoltaic (PV) inverters,
-Energy consumption Electric devices and
-Devices that supply and consume energy, such as battery inverters,
11. The electrical device (1) of claim 11, characterized in that it is selected from the group comprising.