diff --git a/include/powsybl/iidm/VoltageLevel.hpp b/include/powsybl/iidm/VoltageLevel.hpp
index 558ec5d3..46ff9ed5 100644
--- a/include/powsybl/iidm/VoltageLevel.hpp
+++ b/include/powsybl/iidm/VoltageLevel.hpp
@@ -122,6 +122,12 @@ class VoltageLevel : public Container {
 
     stdcxx::range<LccConverterStation> getLccConverterStations();
 
+    unsigned long getLineCount() const;
+
+    stdcxx::const_range<Line> getLines() const;
+
+    stdcxx::range<Line> getLines();
+
     unsigned long getLoadCount() const;
 
     stdcxx::const_range<Load> getLoads() const;
@@ -158,8 +164,20 @@ class VoltageLevel : public Container {
 
     virtual stdcxx::range<Switch> getSwitches() = 0;
 
+    unsigned long getThreeWindingsTransformerCount() const;
+
+    stdcxx::const_range<ThreeWindingsTransformer> getThreeWindingsTransformers() const;
+
+    stdcxx::range<ThreeWindingsTransformer> getThreeWindingsTransformers();
+
     virtual const TopologyKind& getTopologyKind() const = 0;
 
+    unsigned long getTwoWindingsTransformerCount() const;
+
+    stdcxx::const_range<TwoWindingsTransformer> getTwoWindingsTransformers() const;
+
+    stdcxx::range<TwoWindingsTransformer> getTwoWindingsTransformers();
+
     unsigned long getVscConverterStationCount() const;
 
     stdcxx::const_range<VscConverterStation> getVscConverterStations() const;
diff --git a/src/iidm/VoltageLevel.cpp b/src/iidm/VoltageLevel.cpp
index 7a361f3e..bac7c6e6 100644
--- a/src/iidm/VoltageLevel.cpp
+++ b/src/iidm/VoltageLevel.cpp
@@ -125,6 +125,18 @@ stdcxx::range<LccConverterStation> VoltageLevel::getLccConverterStations() {
     return getConnectables<LccConverterStation>();
 }
 
+unsigned long VoltageLevel::getLineCount() const {
+    return getConnectableCount<Line>();
+}
+
+stdcxx::const_range<Line> VoltageLevel::getLines() const {
+    return getConnectables<Line>();
+}
+
+stdcxx::range<Line> VoltageLevel::getLines() {
+    return getConnectables<Line>();
+}
+
 unsigned long VoltageLevel::getLoadCount() const {
     return getConnectableCount<Load>();
 }
@@ -191,6 +203,30 @@ stdcxx::Reference<Substation> VoltageLevel::getSubstation() {
     return m_substation;
 }
 
+unsigned long VoltageLevel::getThreeWindingsTransformerCount() const {
+    return getConnectableCount<ThreeWindingsTransformer>();
+}
+
+stdcxx::const_range<ThreeWindingsTransformer> VoltageLevel::getThreeWindingsTransformers() const {
+    return getConnectables<ThreeWindingsTransformer>();
+}
+
+stdcxx::range<ThreeWindingsTransformer> VoltageLevel::getThreeWindingsTransformers() {
+    return getConnectables<ThreeWindingsTransformer>();
+}
+
+unsigned long VoltageLevel::getTwoWindingsTransformerCount() const {
+    return getConnectableCount<TwoWindingsTransformer>();
+}
+
+stdcxx::const_range<TwoWindingsTransformer> VoltageLevel::getTwoWindingsTransformers() const {
+    return getConnectables<TwoWindingsTransformer>();
+}
+
+stdcxx::range<TwoWindingsTransformer> VoltageLevel::getTwoWindingsTransformers() {
+    return getConnectables<TwoWindingsTransformer>();
+}
+
 const std::string& VoltageLevel::getTypeDescription() const {
     static std::string s_typeDescription = "Voltage level";
 
diff --git a/test/iidm/VoltageLevelTest.cpp b/test/iidm/VoltageLevelTest.cpp
index 0964fe6f..cb7e603d 100644
--- a/test/iidm/VoltageLevelTest.cpp
+++ b/test/iidm/VoltageLevelTest.cpp
@@ -239,6 +239,107 @@ BOOST_AUTO_TEST_CASE(noSubstation) {
     BOOST_CHECK(stdcxx::areSame(voltageLevel.getNetwork(), network));
 }
 
+BOOST_AUTO_TEST_CASE(getLines) {
+    Network network = createComponentsTestNetworkBB();
+    VoltageLevel& voltageLevel = network.getVoltageLevel("VL2");
+    const VoltageLevel& cVoltageLevel = voltageLevel;
+
+    const Line& line2 = network.newLine()
+        .setId("VL2_VL9")
+        .setVoltageLevel1(voltageLevel.getId())
+        .setBus1("VL2_BUS1")
+        .setVoltageLevel2("VL9")
+        .setBus2("VL9_BUS1")
+        .setR(3.0)
+        .setX(33.0)
+        .setG1(1.0)
+        .setB1(0.2)
+        .setG2(2.0)
+        .setB2(0.4)
+        .add();
+
+    const Line& line = network.getLine("VL2_VL5");
+
+    BOOST_CHECK_EQUAL(2, cVoltageLevel.getLineCount());
+    BOOST_CHECK_EQUAL(2, boost::size(voltageLevel.getLines()));
+    BOOST_CHECK_EQUAL(2, boost::size(cVoltageLevel.getLines()));
+
+    const std::vector<std::reference_wrapper<const Line>>& expected = {line, line2};
+
+    const auto& lines = cVoltageLevel.getLines();
+    const auto& cLines = voltageLevel.getLines();
+
+    for (const Line& expectedLine : expected) {
+        auto it = std::find_if(lines.begin(), lines.end(), [&expectedLine](const Line& line) {
+            return stdcxx::areSame(expectedLine, line);
+        });
+        BOOST_CHECK(it != lines.end());
+
+        auto cIt = std::find_if(cLines.begin(), cLines.end(), [&expectedLine](const Line& line) {
+            return stdcxx::areSame(expectedLine, line);
+        });
+        BOOST_CHECK(cIt != cLines.end());
+    }
+}
+
+BOOST_AUTO_TEST_CASE(getThreeWindingsTransformer) {
+    Network network = createComponentsTestNetworkBB();
+    VoltageLevel& voltageLevel = network.getVoltageLevel("VL2");
+    const VoltageLevel& cVoltageLevel = voltageLevel;
+
+    const ThreeWindingsTransformer& twt = network.getThreeWindingsTransformer("3WT_VL1_VL2_VL3");
+
+    BOOST_CHECK_EQUAL(1, cVoltageLevel.getThreeWindingsTransformerCount());
+    BOOST_CHECK_EQUAL(1, boost::size(voltageLevel.getThreeWindingsTransformers()));
+    BOOST_CHECK_EQUAL(1, boost::size(cVoltageLevel.getThreeWindingsTransformers()));
+
+    const std::vector<std::reference_wrapper<const ThreeWindingsTransformer>>& expected = {twt};
+
+    const auto& twts = cVoltageLevel.getThreeWindingsTransformers();
+    const auto& cTwts = voltageLevel.getThreeWindingsTransformers();
+
+    for (const ThreeWindingsTransformer& expectedTwt : expected) {
+        auto it = std::find_if(twts.begin(), twts.end(), [&expectedTwt](const ThreeWindingsTransformer& returnedTwt) {
+            return stdcxx::areSame(expectedTwt, returnedTwt);
+        });
+        BOOST_CHECK(it != twts.end());
+
+        auto cIt = std::find_if(cTwts.begin(), cTwts.end(), [&expectedTwt](const ThreeWindingsTransformer& returnedTwt) {
+            return stdcxx::areSame(expectedTwt, returnedTwt);
+        });
+        BOOST_CHECK(cIt != cTwts.end());
+    }
+}
+
+BOOST_AUTO_TEST_CASE(getTwoWindingsTransformer) {
+    Network network = createComponentsTestNetworkBB();
+    VoltageLevel& voltageLevel = network.getVoltageLevel("VL4");
+    const VoltageLevel& cVoltageLevel = voltageLevel;
+
+    const TwoWindingsTransformer& twt = network.getTwoWindingsTransformer("2WT_VL4_VL5");
+
+    BOOST_CHECK_EQUAL(1, cVoltageLevel.getTwoWindingsTransformerCount());
+    BOOST_CHECK_EQUAL(1, boost::size(voltageLevel.getTwoWindingsTransformers()));
+    BOOST_CHECK_EQUAL(1, boost::size(cVoltageLevel.getTwoWindingsTransformers()));
+
+    const std::vector<std::reference_wrapper<const TwoWindingsTransformer>>& expected = {twt};
+
+    const auto& twts = cVoltageLevel.getTwoWindingsTransformers();
+    const auto& cTwts = voltageLevel.getTwoWindingsTransformers();
+
+    for (const TwoWindingsTransformer& expectedTwt : expected) {
+        auto it = std::find_if(twts.begin(), twts.end(), [&expectedTwt](const TwoWindingsTransformer& returnedTwt) {
+            return stdcxx::areSame(expectedTwt, returnedTwt);
+        });
+        BOOST_CHECK(it != twts.end());
+
+        auto cIt = std::find_if(cTwts.begin(), cTwts.end(), [&expectedTwt](const TwoWindingsTransformer& returnedTwt) {
+            return stdcxx::areSame(expectedTwt, returnedTwt);
+        });
+        BOOST_CHECK(cIt != cTwts.end());
+    }
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }  // namespace iidm