Multi-string SVC (Static Var Compensator) coordination control method

The invention relates to a multi-string SVC (Static Var Compensator) coordination control method, which comprises the following steps of: judging by an equal network loss ratio standard, selecting one of single subcircuit compensation, equidistant coordination compensation or random compensation as a compensation control scheme, and defining a var control numerical value; selecting one SVC control subcircuit as a main control unit from SVC control subcircuits in a power supply system, collecting system voltage and current signals through the main control unit; comparing the system voltage and current signals with a var control target so as to obtain a var power numerical value needed by the system; generating a compensation scheme according to compensator volume of each SVC subcircuit; and issuing a control command to a controlled unit of each subcircuit through the main control unit, and jointly executing the compensation coordination control command through the main control unit and the controlled unit of e