SU1078531A2 - Device for automatic control of frequency and active power of power pool - Google Patents

Abstract

DEVICE FOR AUTOMATIC REGULATION OF THE FREQUENCY AND ACTIVE POWER OF ENERGY COMBINED BY AUTH. No. 556535, characterized in that, in order to increase the reliability and efficiency of the control system, as well as to reduce forced load changes of objects to maintain adjustable parameters of power interconnection, it is additionally equipped for each limiter with a unit for detecting the presence of flow in a given zone, for each regulatory station by the unit for generating unscheduled tasks of the return mode and common for all stations of the block. Forming a command for starting the return mode, with the first, second and third inputs For each block, the formation of unscheduled tasks of the return mode is connected to the output of the blocks for the distribution of increments, respectively, of the frequency regulator and the flow of exchange power and of the power flow limiters along the external and internal links of the energy connection, the fourth to the output of the unit for manual correction of the power of the object, and fifth - to the output of the reset command start command block, the first and second inputs of which are connected to the outputs of the blocks for detecting the presence of a flow in a given zone, the first inputs of which are connected Eny with additional setpoint adjusters of the return mode setpoint, the second inputs are connected to the power from the power viewer, and the outputs of the units for generating unscheduled tasks of the return mode are connected to the additional | these fifth inputs of the units of the form SPV are neither the resulting control actions of individual stations. with

Description

The invention relates to electric power industry and can be used to automatically control the frequency and flow of exchange power and limit power flows on external and internal links of energy connection, operating in parallel with other energy connections.

. According to the main auth. No. 556535. A device is known for automatically regulating the frequency and active power of a power connection operating in parallel with another combination, comprising a frequency regulator and a flow of exchange power, the first input of which is connected to the frequency setting unit, the second to the network frequency meter, and the third to the setting unit. The first one is exchange exchange, and the fourth is with the exchange power flow meter, the external power flow limiter, the first input of which is connected to the setpoint device the power flow through this connection, and the second with the power meter via external communication, the flow restriction via internal communication, the first input of which is connected to the transmitter of the allowable amount of power flow through this connection, as well as the formation blocks of the resulting control actions for control stations, the first inputs of which are connected to the outputs of the frequency regulator and the exchange power flow, the second - with the outputs of the power transfer limiter over external communication, and the third - with the outputs of the power flow limiter via internal In this connection, the frequency controller and the exchange power flow, the power flow limiters, through external and internal communications, contain the control action importer unit and the distribution unit of these increments between the control stations, and the input signals are supplied to the increment formation unit inputs, respectively regulator or limiters, and its output is connected to the input of the increment distribution unit, the outputs of which are outputs respectively of the regulator or flow restrictors properties that are connected to the inputs of the formation blocks of the resulting control actions for individual stations. In addition, the device contains a matching unit, the inputs of which are connected to the output of the incremental distribution unit of the control action of the external power flow limiter, and the fifth input of the frequency regulator and exchange power flow ij.

However, the known device is characterized insufficiently and reliably and efficiently when used in the operation of the control system, since there is no mode for returning the control power plants to their original state when the causes causing the flow restrictor have disappeared, and the coordination of the flow restraints as well as under their action with a frequency regulator and a flow of exchange power and a manual corrector of error rate.

The purpose of the invention is to improve the reliability and efficiency of the control system by reducing forced changes in the load of objects to maintain adjustable parameters of the energy connection due to their release after completing the processes of limiting power flows and organizing the optimal interaction of the frequency regulator and the exchange power and manual power correctors with the work of flow restrictors power.

The goal is achieved by the fact that the device for automatic control of the frequency and active power of the interconnection is additionally equipped for each limiter with a detection unit for the presence of a flow in a given zone, for each control station with a unit for generating unscheduled tasks of the return mode and common for all stations with a unit for generating a mode start command return, with the first, second and third inputs of each block forming unplanned tasks of the mode back connected to the output of blocks definitions of increments, respectively, of the frequency regulator and the flow of exchange power and of the flow limiters ms on external and internal links of the energy connection, the fourth to the output of the unit for manual correction of the object's power, and the fifth to the output of the command for generating the return mode command, the first and the second inputs of which are connected to the outputs of the blocks for detecting the presence of a flow in a given zone, the first inputs of the mains are connected to the additionally set devices of the return mode setpoint, the second inputs are connected to: Ithel m thick nepfeiTOKa, wherein outputs forming unscheduled tasks return mode units are connected to inputs of an additional fifth forming the resulting actuating individual stations impacts blocks. The proposed device allows us to regulate control objects after triggering the limiters and stabilizing power flows to the original planned load, to organize a rational interaction of the frequency regulator and the flow of exchange power, as well as the manual power corrector of the object in order to reduce the unplanned task from the effect of flow restrictors, which allows reduce this unscheduled task for return mode. The return mode of the object is carried out with a significantly lower rate of change of the load of the object than under the action of the current limiters. Therefore, the limiting process can be carried out with greater intensity. Economically, the performance indicators of the power interconnection increase both due to smaller deviations of the load of objects being regulated: neither from the planned one, nor due to the fact that the flows are close to the maximum permissible and are in the zone between the limit flow setting and the volume return mode setting. FIG. 1 shows a block diagram of the device according to FIG. 2 block diagram of the formation of a non-scheduled return mode. The device contains a regulator of 1 frequency and exchange power flow, limiter 2 power flow through external communication, limiter 3 power flow through internal communication, blocks 4 forming the resulting control actions of individual stations, blocks 5 forming the increments of the control action, blocks b distribution of these increments, block 7 of matching the power meter 8 power flows blocks 9 forming unscheduled tasks of the return mode, blocks 10 detecting the presence of the flow in a given zone, block 11 forming a com technological command launch units and return mode 12 manual power correction facilities. Block 9 of forming an unscheduled task of return mode is made in the form of successively connected adder 13, precision integrator 14 with zero-organ, normally closed contact 15 of relay 16, memory 17, normally open contact 18 of relay 16, inertial link 19, normally open contact The 20 relays 16 and the differential link 21, the output of which is connected to one of the inputs of the adder 13. The inputs of the adder 13 are the inputs of block 9, and the output of the differentiating link 21 is the output of block 9. The first input of the regulator 1 is connected to Frequency setting knob f. , the second one - with the meter of network frequency gk the third - with the setpoint of the setpoint of the exchange power flow P, and the fourth one - with the power meter of this flow P. The inputs of the controller 1 are respectively the inputs. Of its block 5 of the formation of the increments of the control action. The output of this block is connected to the input of the incremental distribution block 6, the outputs of which are the outputs of the controller 1 and are connected to the first inputs of the blocks 4 of the generation of effective control actions of individual stations. The inputs of the limiters 2 and 3 of the flow modality, respectively, through external and internal connections are respectively the inputs of their control action increment blocks 5. The first inputs of the limiters 2 and 3 are connected to the limiters of the allowable amount of power flow over the weak link. and the second inputs of blocks 5 of limiters 2 and 3 are connected to the inputs of blocks 6 of the distribution of increments, the outputs of which are the outputs of stops 2 and 3 and simultaneously connected respectively to the intrusions and the third inputs of blocks 4 of the formation of the resulting control actions of individual stations. The fourth additional inputs are connected to the output of blocks 12 of the manual power correction of objects. The outputs of block 6 of limiter 2 are connected to the inputs of block 7 matching, the output of which is connected to the fifth input of controller 1. The first, second and third inputs of blocks 9 forming unplanned tasks of the return mode are connected to the output of blocks 6 of the distribution of increments respectively of frequency regulator 1 and exchange power flow and limiters 2 and 3 power flows through external and internal links of the energy connection, the fourth input is connected to the output of the manual correction unit 12, the object's mass, and the output of the formation unit 11 to the mandates of starting the return mode, the first and second inputs of which are connected to the outputs of the unit 10 for detecting the presence of a flow in a given zone / the first inputs of which are connected to the setpoint 1 and the return mode settings PfiiJoiA and P in-ass, the second inputs are connected to the meters 8 of the power flow, moreover, the outputs of the blocks 9 forming unplanned tasks of the return mode are connected to the additional fifth inputs of the blocks 4

the formation of the resulting control actions of individual stations.

The device works as follows. in a way.

When the power flow limiters 2 and 3 are triggered, the magnitude of the increments of the control actions on each control object from each limiter is algebraically summed in the adder 13, integrated in the integrator 14 and fed into the memory 17, through the normally closed contact 15 of the relay 16. as a result of the operation of limiters 2 and 3 and the actions of the dispatcher to redistribute the load and eliminate disturbances in the power supply, and the controlled flow decreases.

The current flow values are monitored by blocks 10 detecting the presence of the flow in a given zone. Upon a command from the block 11 to form the command for starting the return mode, a relay 16 is started, which opens contact 15 and closes contacts 18 and 20 and prepares the return mode circuits, i.e. through the inertial link 19 and the differentiating link 21 into the unit 4 of the formation of the resulting control actions of individual stations, the task of the opposite sign arrives at a speed substantially lower than when the limiters are operating. At the same time, the output of the differentiating link 21 is fed to the input of the adder 13 and thereby reduces the unscheduled task of the return mode. This process continues until the unscheduled task is reduced to zero, and the object returns to the planned load. The zero-organ of the integrator 14 acts on the relay 16, the release. after that, the initial circuits of the circuit of the block 3 forming unscheduled tasks of the return mode are restored. The choice of a constant integration time and speed of the return mode is made by adjusting the specified standard blocks.

Under the action of the regulator 1 frequency and the flow of exchange power or

0, the dispatcher's action with the help of a manual offset of 12 ms in the direction opposite to the previously accumulated unscheduled task from the work of limiters 2 and 3, occurs a corresponding decrease in this value in the block 9 of forming an unscheduled task of return mode, i.e. The actions of the frequency regulator 1 and the exchange power flow are automatically read into the return mode.

In the proposed device, the interaction of the exchange power flow rate regulator 5 with the operation of the power flow limiters is taken into account.

The regulator of the frequency and flow of the exchange power suppresses oscillations with a period of 10–15 min. The dispatcher usually corrects the mode of the power supply operation at half-hour intervals.

As the analysis of the operating regimes of power interconnections every day during periods of recession and the rise of load graphs, it becomes necessary to limit power flows up to 2-4 times per day.

Thus, the device allows to increase reliability and efficiency of work at a minor additional cost.

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Claims (1)

DEVICE FOR AUTOMATIC REGULATION OF FREQUENCY AND ACTIVE POWER OF ENERGY ASSOCIATION according to ed. No. 556535, characterized in that, in order to increase the reliability and efficiency of the regulation system, as well as reduce the forced changes in the load of objects to maintain adjustable ³ parameters of the energy connection, it is additionally equipped with a block for detecting the location of the overflow in a given zone for each regulator, for each control stations by the unit for generating unscheduled tasks of the return mode and the block common to all stations · Forming a command to start the return mode, with the first, second and third inputs of each unit for generating unscheduled tasks of the return mode are connected to the output of the increment distribution blocks, respectively, of the frequency controller and exchange power transfer and power flow limiters for external and internal connections of the power connection, the fourth to the output of the unit for manual correction of the object’s power, and the fifth to the output of the start command formation unit return mode, the first and g second inputs of which are connected to the outputs of the blocks detecting the location of the overflow in a given zone, the first inputs of which are connected to tively entered setpoint return mode, second inputs connected to the g power flow measurers, wherein forming block outputs unscheduled tasks * return mode are connected to inputs of an additional fifth control blocks forming the resulting effects of individual stations.