SU1275409A1 - Method of automatic controlling of capacitor banks of power system - Google Patents

Abstract

The invention relates to the field of automation of power systems, mainly to the automation of the regulation of capacitor g batteries in distribution power grids and power grids of electric power consumers. The purpose of the invention is improving the efficiency of the power system. For this purpose, the method of automatically regulating the capacitor banks of the power system, which consists in controlling the capacitor battery according to two laws of regulation, one of which is carried out according to the local factor, controls the regime parameter of the power system. After that, this parameter is compared with a predetermined value, and when a mismatch occurs, an external signal is formed and the law of regulation of the local capacitor bank is changed in the direction corresponding to the change in the power system mode parameter. When implementing the method, a failure of the elements of the center of control does not cause an unacceptable operation of the capacitor battery, since In any case, the automatic control of a capacitor battery by the local automatic device is maintained according to one of the technically permissible regulation laws. 1 il.

Description

The invention relates to automation of power systems, primarily to the automation of the regulation of capacitor batteries in distribution power grids and power grids of electrical power consumers.

The aim of the invention is to improve the efficiency of the power system.

Information on the monitored parameters of the supply networks should characterize the balance of reactive power in the power system as a whole, the reserves for the stability of the power system, and the efficiency of the regime. These factors can be judged by the voltage level at the control points of the energy system, by the power flows through controlled lines, in fact, by the operation of uneconomical equipment. Primary information about these factors can be obtained using telemechanics devices.

The drawing shows a block diagram of a device that implements the proposed method.

Primary information on the monitored parameters of the power system mode is collected by means of a telemetry unit 1 or a television signaling of voltage, currents, and power flows. This information is entered into block 2 comparisons with given values. When a mismatch occurs, the corresponding signal is transmitted to the mismatch analysis unit 3, in which each error signal is preassigned in advance with a specific command to change the law for regulating capacitor banks. These commands are transmitted via the 4 lines of communication (telemechanics) to the distributors of 5 teams installed in the territorial enterprises of electrical networks (PES). Further, these commands are transmitted via lines 6 of the remote (telemechanics) between the PES and the electric grid regions of the ERES, where, using the distributor, 7 commands are transmitted along lines 8 of the local (telemechanics) to block 9 of the change in the regulation law of the capacitor battery, which changes the control settings in the local automatic regulator of capacitor battery 10

For example, when using a capacitor bank regulator, block 9 may in one case impose a law

control over the minimum allowable voltage (if necessary with current correction), and in another case - according to the maximum allowable

voltage. If necessary, the local capacitor bank regulator should include operation limits for the permissible current.

When implementing the proposed method, the failure of the centralized control elements does not cause an unacceptable operation of the capacitor battery, since in any case the automatic

control of a capacitor battery by a local automatic device according to one of the technically permissible laws of regulation.

Example, In accordance with the long-term forecast for this period, an excess of reactive power in the power system is assumed and consumers are given minimal compensation for reactive power. According

5, with this assignment, on the ground, set the laws for regulating capacitor batteries according to the minimum allowable voltage at the power receivers. However, due to deviations in the water flow of the rivers or the fuel conjuncture, the mode of the power system changes and a deficit of reactive power is formed. To ensure the stability of the power system, it is necessary to maintain higher voltages. Due to the lack of the possibility of promptly transmitting this information to the field, it is not possible to promptly change the law of regulating capacitor batteries and we have to start up the synchronous compensators (CK) hydraulic units of hydroelectric power stations with a specific consumption of electrical power of 50 W to generate 1 kBA of reactive power. When implementing the proposed method in block 2, a voltage mismatch signal is generated in the control node of the power system with a preset or a signal about the operation of the hydraulic unit in the electrical system with higher reactive power. In block 3, these signals correspond to the command to turn on capacitor batteries in given PES, which is transmitted through information channel 4-8 and entered into

block 9. The latter decunts the corresponding resistance in the measuring circuit of regulator 10, which increases the voltage setting and (at

Claims (1)

Claim A method for automatically controlling the capacitor batteries of an energy system 5, consisting in the fact that the capacitor bank is controlled according to two regulation laws, one of which is applied according to the local factor, characterized in that, 10, in order to increase the efficiency of the energy system, they control the operating parameter of the energy system, compare it with a given value, when a mismatch occurs, they form an external signal and change the regulation law of the local capacitor bank ₽ side corresponding to the change in the operating mode Dr. grid.