Several control principles for the electromagnetic brake of synchronous generators have been established in order to ensure that the electric power system remains stable in the face of a variety of disruptions. It has been demonstrated that the employment of an electromagnetic brake makes it feasible to maintain the dynamic and static stability of the system under consideration. With the unipolar dependence of braking torque on brake excitation current taken into consideration, a strategy and algorithm for determining reference EMT power control have been established.
The primary function of the electric power system (EPS) is to provide consumers with an affordable and dependable source of electricity while maintaining the required level of quality in the electricity. All of the elements of the EPS are linked together by the unity of the processes of electrical energy generation, transmission, distribution, and consumption, as well as the processes that occur when the status of the system changes, which are all part of the EPS. It is essential for the reliable operation of EPS that generators operate in synchronism with one another as part of a single energy system, which is one of the primary requirements. While transient processes are occurring, the operating conditions of the EPS are greatly influenced, particularly the reliability of its operation as well as the stability and survival of the system.
The failure of the generator to operate in synchronism with the rest of the power system results in considerable fluctuations in the electrical regime’s parameters (currents, voltages, and so on), which triggers the activation of relay protection devices and emergency automatics. A significant number of control actions can result in the shutdown of generators that have become out of sync with one another, a disturbance in the delivery of electricity to a large number of consumers, or even a total collapse of the power system, depending on how many control actions are taken. As a result, one of the most significant jobs in the design and operation of an electric power system is to ensure the system’s stability.
To improve the flow of electromechanical transients, a variety of technological approaches and organisational measures have been identified. Each method and measure has its own set of advantages and disadvantages, which may be found in the table above.
An electromagnetic brake, which is a relatively new method of increasing the circumstances of dynamic stability, is described below (EMB). Upon activation of the EMT, the device generates an additional load moment, which has a direct impact on the balance of moments on the shaft of the generating unit. According to the results of the research that have been undertaken, the functioning of the EMT makes it possible to prevent violations of the dynamic stability of producing units in a large electric power system.
In large power systems where ensuring dynamic stability is critical, the independence of braking torque from EPS mode characteristics, as well as the speed and efficiency of the EMT, can be leveraged to improve braking performance. The creation of EMT power control laws is one of the prerequisites for the use of EMT as a technique of assuring dynamic stability in electrical machines.