SU1067563A1 - Device for automatic limiting of power system with multiray configuration - Google Patents

Abstract

1. DEVICE FOR AUTOMATIC POWER LIMITS FLOWS The multipath CHART ENERGY comprising serially connected gauges flows in the n-rays, forming dummy block signals overflows and flows limiter arranged in blocks and m-regulator power plants in tori m -rays of t Applied to the fact that, in order to increase the efficiency of the device, it is equipped with indicators of power increment signs in m-rays and logical blocks according to the number of amplifiers signs of the ms increment ti, each of which generates a signal at one of its outputs in the presence of signals at both inputs, and the presence of a signal at the first or second output depends on the polarity of the signal at the setup input, while the outputs of the limiter blocks are combined and connected to the working inputs of logic blocks, the output of each logical block, j is connected to the corresponding regulator of the power of the regulating electric power (L station, the setup input is connected to the output of the corresponding indicator of the power increment sign, and the input of each actuator of the sign The rotation is connected to the output of the corresponding flow meter.

Description

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2. The device according to claim 1, characterized in that, in order to improve the quality of control, logic blocks are made with memorizing the initially formed output signal for the time that the signal exists at its working input.

The invention relates to the operation of power systems and can be used to automatically limit power flows. along power lines, which are overloaded during operation in normal and post-fault conditions under conditions of static adaptability.

A device is known for automatically limiting power flows in a multi-beam power system comprising flow meters in ti rays, a dummy flow signal generating unit and a flow limiter / made in the form of blocks, the number of which is chosen according to the number of segments of the static stability zone curve. The signals from the output of each of the blocks of the limiter are fed to the power controllers of the regulating flow of power stations of one of the tn-rays l.

However, performing power control of stations of a particular beam only upon the effect of certain blocks of the limiter does not ensure effective operation of the device over the entire range of possible mode changes leading to overload, since the operation of the same limiter is possible with different directions of change. modes that require different controls.

The purpose of the invention is to provide a guaranteed input into the range of allowable modes and thereby ensure the effective operation of the device over the entire possible range of mode changes leading to communication overload.

This goal is achieved by the fact that a device for automatically limiting power flows in a multi-beam power system scheme containing successively connected flow meters in n-beams, a unit for generating signals of dummy flows and a flow limiter made in the form of blocks and tr of power suppressors in the beams in m-beams are equipped As a result, the signs of the power increment in m-rays by logical blocks are based on the number of detectors of the power increment signs.

each of which generates a signal at one of its outputs in the presence of signals at both inputs, and the presence of a signal at the first or second 5 output depends on the polarity of the signal at the setup input, while the outputs of the limiter blocks are combined and connected to the working inputs of logic, blocks, the output of each logical block 0 is connected to the corresponding power regulator of the regulating power station, the setup input is i to the output of the corresponding exponent of the ms increment sign, and the input

5-each indicator of the increment signs is connected to the output of the corresponding flow meter.

At the same time, in order to improve the quality of control, the logic blocks are made with memorizing the initially formed output signal for the time that the signal exists at its working input.

FIG. Figure 1 shows the functional diagram of the device for a variant with three beams, each of which has a regulating station; in fig. 2 is a variant of the logic block.

Q The device contains 1 flow meters,. block 2 forming signals of fictitious flows, blocks 3 of limiter, regulators 4 of power of control stations, exponents 5

from the signs of power increment, logical blocks 6, with the outputs from the meters 1 of the power flow connected to the inputs of the unit 2 forming signals of dummy power flows and the inputs of the outputs of the 5 characters of the power increment. Outputs

0 block 2 forming signals of fictitious flows are connected to the inputs of blocks 3 of the limiter, the outputs of which are combined and connected to the working inputs of logic blocks 6. You 5 strokes of logic blocks are connected

to the 4 power regulators, regulated stations, and the tuning inputs to the outputs of the detectors are 5 digits of the power increment, in the order corresponding to connecting the outputs of the logic blocks 6 to the 4 station regulators, i.e. The configuration input of the logic unit, the output of which is connected to the power controllers of the 1st beam stations, is connected to the power increment indicator in the same beam. The logic unit has two inputs: input A - tuning, input B - working. The logical unit consists of two threshold elements 7 and 8, two logical elements 9 AND, two elements 10 of memory and logical element 11 NOT, and the inputs of the threshold elements are combined and are the tuning input of the logical unit (input A) the outputs of the first and second threshold elements are connected to the first inputs of the first and second elements AND, the second inputs of the elements AND and the input of the logic element 11 are NOT combined and form the working input of the logic unit (input B), the outputs of the logic elements 9 AND are connected respectively to the first mu and second memory elements, the second inputs of memory elements grouped and Con cheny to the output member 11 rtE, outputs the memory elements correspond Koman give an increase or reduction in the power regulating stations. The device works as follows. From the flow meters 1, signals proportional to the powers in the monitored beams are transmitted to the inputs of the block 2 forming the signals of the dummy flows and the outputs of the signals of 5 signs of the power increment. At outputs of detectors of 5 digits of power increment, positive or negative signals are generated. Depending on the nature of the power change in the corresponding beam, the power increases or decreases. From the outputs of detectors 5, signals are transmitted to the tuning inputs of logic blocks 6 Signals of dummy flows generated by formation unit 2 are transmitted to the inputs of the corresponding blocks 3 of the limiter. When the value of the signal of the dummy flow of the setting of the corresponding block of limiter 3 is exceeded, a signal appears at its output. which is transmitted to the working inputs of logic blocks 6 .. If there are signals at both inputs of logic block 6, depending on the polarity of the signal at the configuration input of this block, its output forms A signal for gaining or reducing power is transmitted, which is transmitted to the power controllers 4 of the control stations of the respective beam. In order to eliminate the possible oscillatory process of control at the boundary of the limiter and thereby increase the quality of control, Ksokd logic block 6 is configured to memorize the initially generated output signal for the time the signal existed at its working input. The logic unit works as follows. When the threshold elements 7 and 8 appear at the input of a negative polarity signal, element 1 is triggered and the signal from its output goes to the first input of the first element. 9 I. This signal is present at the input of element 9 as long as there is a negative signal at the input of the threshold element 7. The signal at the first input of the second element I is formed when the second threshold element 8 is triggered, which occurs when the input element appears 8 signals of positive polarity. By the time the signal appears at the working input of the unit (in. B), either the first or the second element is triggered. Depending on which element AND is triggered, a signal is produced from their outputs Reduce or Increase the power of each of these signals is memorized in memory elements 10. The memory is reset when the signal at the working input of the unit (input B) disappears. In this embodiment, the coding of the signal to the power control of the regulating station is performed by using two outputs: one for passing the signal to Decrease the power and the other to Increase. Other coding methods are possible, for example, output signal coding. The coding method is related to the specific design of the device, in particular, depends on the type of equipment for connecting the flow restriction device to the regulating stations or the type of station regulators themselves and is not essential for the proposed device. Thus, the device allows to effectively limit the power flows in the whole range of possible mode changes.

FI.2.

Claims (2)

1. A DEVICE FOR AUTOMATIC LIMITATION OF POWER FLOWS IN A MULTI-BEAM ENERGY SYSTEM, comprising series-connected meters of power flows in η-rays, a block for generating signals of dummy power flows and a power limiter, made in the form of blocks and m-controllers for power of power plants and characterized in that, in order to increase the efficiency of the device, it is equipped with identifiers of signs of power increment in m-rays and logical blocks by the number of identifiers of signs of increment of fashion, each of which generates a signal at one of its outputs in the presence of signals at both inputs, and the presence of a signal at the first or second output depends on the polarity of the signal at the tuning input, while the outputs of the limiter blocks are combined and connected to the working inputs of the logical blocks, the output of each - the logic unit is connected to the corresponding power regulator of the regulatory power plant, the tuning input is to the output of the corresponding power increment sign detector, and the input of each increment sign detector output corresponding to measured ritelyaperetokov. fig) 2. The device according to π. 1, the difference is that, in order to improve the quality of control, the logic blocks are made with storing the initially formed output signal for the duration of the signal at its working input.