SU1698930A1 - Method of control over parameters of emergency mode related to balance of reactive power of supply power network - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to reduce the installed capacity of the reactive power compensator of the supply network. To do this, in the presence of an emergency mode, not only the reactive power of the mains compensator is changed, but also the compensators of the distribution network, and the indicated power change of the compensators of the distribution network is carried out for the time selected from the condition of maintaining the stability of the load nodes. 1 il.

Description

The invention relates to electrical engineering and can be used to increase throughput, stability in emergency conditions of electrical systems.

The purpose of the invention is to reduce the installed capacity of the reactive power supply compensator.

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

The device includes a sensor 2 of the mode control parameter connected to the mains supply, the output of which is connected to the regulator 3 of the reactive power compensator 4, which regulates the mode of the mains supply. The signal from the output of sensor 2 of the control parameter is also fed to the inputs of blocks 5 and 6 of the comparison and to the inputs of blocks 7 and 8 of the time limit (time relay). The time delay of the latter is consistent with the permissible duration of a full connection.

or shutdown of the installed capacity of individual compensators at the nodes of the distribution network on the condition of maintaining the stability of the complex load at these nodes. The settings of units 5 and 6 of the comparison correspond to the upper and lower emergency levels of the parameter for regulating the power supply network mode, and the outputs of these blocks are connected to the inputs of the executive bodies 9 and 10, the inputs of which are connected to the regulators 11 separate compensators 12 reactive power in the distribution network 13.

The control method is carried out as follows.

Using the sensor 2 parameter adjustment determine the nature of the emergency mode. For example, if sensor 2 readings are close to zero, which corresponds to the mode. short-circuit in the power supply network and the lowest emergency level of the control parameter, the power compensator 4 peakniBHOu power is switched to the maximum mode (L

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gogpg.rirovachi power and the simultaneous use of blocks b 10, 11 are transferred to the generation of maximum power compensators 12 distribution, eg 13. With block 8, the time limit M., started by the signal of sensor 2, after a certain time, the effect of the specified control signal compensators 12, which is associated with the conditions of the D / YMI operation of these devices in the nodes of the public distribution network of the distribution network 13.

In the case of an increase in the voltage in the power supply network 1 by the signal of the sensor 2, the parameters of the seg- lers / channels corresponding to the maximum emergency level, the com- puter-4 reactive power transfer is -1 to the maximum consumption, POSP /. 1h at the same time using blocking, 5, C, 1 I switch compensators 12 to the minimum-gelation mode (or maximum, i |, e & l), from the C of the network 13. At the same time, unit 7 is limited to, time works same as in / szhime short circuit. The need to install units 7 and 8 of the time limit is determined by the nature of the load r, the nodes of the distribution network.

The implementation of the control unit according to the proposed method does not present technical difficulties and separate 1: the units of the device can be performed on the basis of well-known schemes and conventional techniques for the control systems.

The invention allows for selecting power supply network modes to select reactive power compensators, taking into account the use of power of compensators in the distribution network, which increases the technical and economic performance of the electrical network.

Claims (1)

Invention Formula The method of controlling the emergency mode parameters associated with the reactive power balance of the supply network, which has separate reactive power compensators in the distribution network of the load node, according to which the control parameter, characterizing the balance of the reactive power of the supply network, is measured, corresponding to the upper emergency level supply network, the reactive power compensator in the supply network is switched to the minimum reactive power generation mode, and At the value of the control parameter corresponding to the lower emergency level, the reactive power compensator of the supply network is switched to the maximum reactive power output mode, characterized in that, in order to reduce the installed power of the reactive power compensator of the supply network, the value of the control parameter of the supply network corresponding to the upper emergency power level compensators, the reactive power compensators of the distribution network of the load node are also switched to the minimum generation mode For example, when the value of the power supply control parameter corresponding to the lower emergency level, reactive power compensators in the distribution network of the load node are also switched to the maximum reactive power output mode, and these transfers of the compensators of the distribution network are carried out for the time stability of load nodes in the distribution network.