Dynamic simulation experiment device for researching dynamic characteristic of direct current (DC) transmission system

The invention provides a dynamic simulation experiment device for researching dynamic characteristics of a direct current (DC) transmission system. The dynamic simulation experiment device is used for prepost training for DC operating staff. A main circuit of the DC transmission system comprises a rectifying side circuit and an inverting side circuit; an alternating current (AC) bus I of the rectifying side circuit is connected with a rectifying side equivalent AC grid of a dynamic simulation lab, namely an external commercial grid; the AC voltage is 380 V for simulating the 380 kV actual AC voltage; an AC bus II of the inverting side circuit is connected with an inverting side circuit equivalent AC grid of the dynamic simulation lab, namely a dynamic simulation net; the AV voltage is 1,000 V for simulating the 500 kV actual AC voltage; and an upper computer acts on the inverting side equivalent AC grid of the dynamic simulation lab of the inverting side circuit and a DC transmission system main circuit by controlling a protection circuit so as to simulate the instantaneous DC dynamic response of the fault AC end of the inverting side circuit.