diff --git a/pyFTS/common/fts.py b/pyFTS/common/fts.py
index b0c66e5..ca651eb 100644
--- a/pyFTS/common/fts.py
+++ b/pyFTS/common/fts.py
@@ -503,7 +503,7 @@ class FTS(object):
                 params = [ None for k in self.transformations]
 
             for c, t in enumerate(self.transformations, start=0):
-                ndata = t.apply(ndata,params[c])
+                ndata = t.apply(ndata, params[c], )
 
         return ndata
 
diff --git a/pyFTS/common/transformations/som.py b/pyFTS/common/transformations/som.py
new file mode 100644
index 0000000..af66c26
--- /dev/null
+++ b/pyFTS/common/transformations/som.py
@@ -0,0 +1,72 @@
+"""
+Kohonen Self Organizing Maps for Fuzzy Time Series
+"""
+import pandas as pd
+import SimpSOM as sps
+from pyFTS.models.multivariate import wmvfts
+from typing import Tuple
+from pyFTS.common.Transformations import Transformation
+
+
+class SOMTransformation(Transformation):
+    def __init__(self,
+                 grid_dimension: Tuple,
+                 **kwargs):
+        # SOM attributes
+        self.net: sps.somNet = None
+        self.data: pd.DataFrame = None
+        self.grid_dimension: Tuple = grid_dimension
+        self.pbc = kwargs.get('PBC', True)
+
+        # debug attributes
+        self.name = 'Kohonen Self Organizing Maps FTS'
+        self.shortname = 'SOM-FTS'
+
+    # def apply(self, data, endogen_variable, param, **kwargs): #TODO(CASCALHO) MELHORAR DOCSTRING
+    #     """
+    #     Transform dataset from M-DIMENSION to 3-dimension
+    #     """
+    #     pass
+
+    def __repr__(self):
+        status = "is trained" if self.is_trained else "not trained"
+        return f'{self.name}-{status}'
+
+    def __str__(self):
+        return self.name
+
+    def __del__(self):
+        del self.net
+
+    def train(self,
+              data: pd.DataFrame,
+              percentage_train: float = .7,
+              leaning_rate: float = 0.01,
+              epochs: int = 10000):
+        self.data = data.values
+        limit = round(len(self.data) * percentage_train)
+        train = self.data[:limit]
+        x, y = self.grid_dimension
+        self.net = sps.somNet(x, y, train, PBC=self.pbc)
+        self.net.train(startLearnRate=leaning_rate,
+                       epochs=epochs)
+
+    def save_net(self,
+                 filename: str = "SomNet trained"):
+        self.net.save(filename)
+
+    def show_grid(self,
+                  graph_type: str = 'nodes_graph',
+                  **kwargs):
+        if graph_type == 'nodes_graph':
+            colnum = kwargs.get('colnum', 0)
+            self.net.nodes_graph(colnum=colnum)
+        else:
+            self.net.diff_graph()
+
+
+"""
+Requisitos
+    - apply(herdado de transformations): transforma os conjunto de dados 
+    - inverse - não é necessária 
+"""
diff --git a/pyFTS/models/multivariate/som.py b/pyFTS/partitioners/som.py
similarity index 88%
rename from pyFTS/models/multivariate/som.py
rename to pyFTS/partitioners/som.py
index f1faf67..059ea11 100644
--- a/pyFTS/models/multivariate/som.py
+++ b/pyFTS/partitioners/som.py
@@ -7,7 +7,7 @@ from pyFTS.models.multivariate import wmvfts
 from typing import Tuple
 
 
-class SOMFTS:
+class SOMPartitioner:
     def __init__(self,
                  grid_dimension: Tuple,
                  **kwargs):
@@ -17,10 +17,6 @@ class SOMFTS:
         self.grid_dimension: Tuple = grid_dimension
         self.pbc = kwargs.get('PBC', True)
 
-        # fts attributes
-        self.fts_method = kwargs.get('fts_method', wmvfts.WeightedMVFTS)
-        self.order = kwargs.get('order', 2)
-        self.is_trained = False
 
         # debug attributes
         self.name = 'Kohonen Self Organizing Maps FTS'
@@ -60,4 +56,12 @@ class SOMFTS:
             colnum = kwargs.get('colnum', 0)
             self.net.nodes_graph(colnum=colnum)
         else:
-            self.net.diff_graph()
\ No newline at end of file
+            self.net.diff_graph()
+
+
+
+"""
+Requisitos
+
+
+"""
\ No newline at end of file
diff --git a/pyFTS/tests/test_SOMTransformation.py b/pyFTS/tests/test_SOMTransformation.py
new file mode 100644
index 0000000..e1fab22
--- /dev/null
+++ b/pyFTS/tests/test_SOMTransformation.py
@@ -0,0 +1,47 @@
+import unittest
+from pyFTS.common.transformations.som import SOMTransformation
+import pandas as pd
+import os
+
+class MyTestCase(unittest.TestCase):
+    def test_apply(self):
+        self.assertEqual(True, False)
+
+    def test_save_net(self):
+        som_transformer = self.som_transformer_trained()
+
+        filename = 'test_net.npy'
+        som_transformer.save_net(filename)
+        files = os.listdir()
+
+        if filename in files:
+            is_in_files = True
+            os.remove(filename)
+        else:
+            is_in_files = False
+
+        self.assertEqual(True, is_in_files)
+
+    def test_train(self):
+        self.assertEqual()
+
+    @staticmethod
+    def simple_dataset():
+        data = [
+            [1, 1, 1, 1, 1],
+            [1, 1, 1, 1, 0],
+            [1, 1, 1, 0, 0],
+            [1, 1, 0, 0, 0],
+            [1, 0, 0, 0, 0],
+        ]
+        df = pd.DataFrame(data)
+        return df
+
+    def som_transformer_trained(self):
+        data = self.simple_dataset()
+        som_transformer = SOMTransformation(grid_dimension=(2, 2))
+        som_transformer.train(data=data, epochs=100)
+        return som_transformer
+
+if __name__ == '__main__':
+    unittest.main()