Full load test system of electrical power converter and the test method thereof

1. A method of a full load test of a power converter, comprising:

(a) providing a power converter under test (PCUT);

(b) configuring said PCUT in a test circuit;

(c) serially connecting said PCUT with at least one bidirectional power converter in said test circuit;

(d) connecting said test circuit to an alternating current (AC) low voltage power source; and

(e) performing a full load test of said PCUT;

wherein said PCUT in step (c) is a DC/DC converter, said test circuit is connected in parallel with said AC low-voltage power source and said at least one bidirectional power converter includes a first bidirectional power converter and a second bidirectional power converter, wherein said the test circuit includes a test start point located on said AC low voltage power source, a first filter electrically connected with said test start point, said first bidirectional power converter electrically connected with said first filter, said PCUT electrically connected with said first bidirectional power converter, said second bidirectional power converter connected with said PCUT, a second filter electrically connected with said second bidirectional power converter and a test end point located on said AC low voltage power source to electrically connect with said second filter.

2. The method of claim 1 , wherein said AC low-voltage power source is an AC three-phase power source with voltage range from 220 volts to 600 volts.

3. The method of claim 1 , wherein said first filter and said second filter are LCL filters.

4. A method of a full load test of a power converter, comprising:

(a) providing a power converter under test (PCUT);

(b) configuring said PCUT in a test circuit;

(c) serially connecting said PCUT with at least one bidirectional power converter in said test circuit;

(d) connecting said test circuit to an alternating current (AC) low voltage power source; and

(e) performing a full load test of said PCUT;

wherein said PCUT in step (c) is an AC/DC converter, said test circuit is connected in parallel with said AC low-voltage power source and said at least one bidirectional power converter includes a first bidirectional power converter, wherein said the test circuit includes a test start point located on said AC low voltage power source, a first filter electrically connected with said test start point, said first bidirectional power converter electrically connected with said first filter, said PCUT electrically connected with said first bidirectional power converter and a test end point located on said AC low voltage power source to electrically connect with said PCUT.

5. The method of claim 4 , wherein said first filter is an LCL filter.

6. A method of a full load test of a power converter, comprising:

(a) providing a power converter under test (PCUT);

(b) configuring said PCUT in a test circuit;

(c) serially connecting said PCUT with at least one bidirectional power converter in said test circuit;

(d) connecting said test circuit to an alternating current (AC) low voltage power source; and

(e) performing a full load test of said PCUT;

wherein said PCUT in step (c) is an AC/DC converter, said test circuit does not connect in parallel with said AC low-voltage power source and said at least one bidirectional power converter includes a first bidirectional power converter and a second bidirectional power converter, wherein said the test circuit includes a test start point located on said AC low voltage power source, a first filter electrically connected with said test start point, said first bidirectional power converter electrically connected with said first filter, a loop circuit electrically connected with said first bidirectional power converter, said PCUT electrically connected with said loop circuit, said second bidirectional power converter located on said loop circuit to connect in parallel with said PCUT, a second filter located on said loop circuit to electrically connect with said second bidirectional power converter.

7. The method of claim 6 , wherein said first filter and said second filter are LCL filters.

8. A system of a full load test of a power converter, comprising:

an alternating current (AC) low voltage power source;

a test circuit coupled to said AC low voltage power source;

a power converter under test (PCUT) configured in said test circuit; and

at least one bidirectional power converter connected in series with said PCUT in said test circuit;

wherein said PCUT is a DC/DC converter, said test circuit is connected in parallel with said AC low-voltage power source and said at least one bidirectional power converter includes a first bidirectional power converter and a second bidirectional power converter, wherein said the test circuit includes a test start point located on said AC low voltage power source, a first filter electrically connected with said test start point, said first bidirectional power converter electrically connected with said first filter, said PCUT electrically connected with said first bidirectional power converter, said second bidirectional power converter connected with said PCUT, a second filter electrically connected with said second bidirectional power converter and a test end point located on said AC low voltage power source to electrically connect with said second filter.

9. The system of claim 8 , wherein said first filter and said second filter are LCL filters.

10. A system of a full load test of a power converter, comprising:

an alternating current (AC) low voltage power source;

a test circuit coupled to said AC low voltage power source;

a power converter under test (PCUT) configured in said test circuit; and

at least one bidirectional power converter connected in series with said PCUT in said test circuit;

wherein said PCUT is an AC/DC converter, said test circuit is connected in parallel with said AC low-voltage power source and said at least one bidirectional power converter includes a first bidirectional power converter, wherein said the test circuit includes a test start point located on said AC low voltage power source, a first filter electrically connected with said test start point, said first bidirectional power converter electrically connected with said first filter, said PCUT electrically connected with said first bidirectional power converter and a test end point located on said AC low voltage power source to electrically connect with said PCUT.

11. The system of claim 10 , wherein said first filter is an LCL filter.

12. A system of a full load test of a power converter, comprising:

an alternating current (AC) low voltage power source;

a test circuit coupled to said AC low voltage power source;

a power converter under test (PCUT) configured in said test circuit; and

at least one bidirectional power converter connected in series with said PCUT in said test circuit;

wherein said PCUT is an AC/DC converter, said test circuit does not connect in parallel with said AC low-voltage power source and said at least one bidirectional power converter includes a first bidirectional power converter and a second bidirectional power converter, wherein said the test circuit includes a test start point located on said AC low voltage power source, a first filter electrically connected with said test start point, said first bidirectional power converter electrically connected with said first filter, a loop circuit electrically connected with said first bidirectional power converter, said PCUT electrically connected with said loop circuit, said second bidirectional power converter located on said loop circuit to connect in parallel with said PCUT, a second filter located on said loop circuit to electrically connect with said second bidirectional power converter.

13. The system of claim 12 , wherein said first filter and said second filter are LCL filters.