Simulation verification method for relay protection coordination relationship

The invention discloses a simulation verification method for relay protection coordination relationship, which comprises the following steps: acquiring power network model data and definite values in a protection device; simulating failures of any type and in any position of the power network and finding out the influenced element group and influenced protection unit; calculating the electric quantity variation during failure and after the removal of the failure in a simulation manner; confirming the fault current, the fault voltage, the fault impedance, the fault power, and other information of each influenced element; calculating related values of the influenced protection unit according to the electric quantity of the influenced elements; analyzing the model of the protection unit of which the running is influenced; and deciding whether to start protection or not. If protection starts, a network matrix is modified, simulation is continuously carried out, and the influenced element group and the influenced protection unit are acquired again; the process is performed repeatedly until the failure is isolated radically; and after the simulation, a complete simulation report is generated. The method can simulate power network failure situations, and realize verification to the correction and the reasonableness of the protection definite values through checking all action behaviors related to the protection.