SU1415323A1 - Device for controlling voltage of power plant - Google Patents

Description

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And: the best fire performance of the yuktrohekhnik, in particular, the re-calculation of the loads on ii. ieKi growth.

lU .ib and: gaining a new speed by reducing the switching time of the branches of the communication transformer and increasing the reliability.

FIG. 1 shows the st1) ukturna automatic control circuit; in fig. 2 is a power supply circuit through communication transformers having a WG1H.

FIG. 1 and 2 are the secondary regulator of voltage 1 of the power plant, regulator 2 of the voltage of the transformer of communication, logical:) elements 3 3, OR 7 and 8, ID 9 14. og1) anchiteli of the upper 15 and lower K ) excitation limits, devices (|) () of 17 | 5ac11 determination) active power between generators). the outputs 18 and 19 of the upper and lower excitation limiters, respectively, element) and 20 and 21 are time required for the priority operation of the upper and lower limiters, channels 22 and 23, respectively, Less and No Excitation Control generator, channels 24 and 25 "Below and" Removal of pa switching between branches FI1H trans- (|) ormato) communications, logpichnye elements 26 and 27 of the memory, measurable. 1 the magnitude of the excitation current 28 of the respective generator, a voltage of 29 hm1e) voltage, regulates the excitation mountain 30 of the generators.

VcTpoiicrno works with. In the following way. In the initial state at the output of the secondary regulator 1 and regulator 2, there are no sishals, the voltage and reactive power of the power plant are in the t) range (in the zone), in the canal. there are no signals either. 1: If the voltage regulator 2 of the transformer acts in the direction of decreasing (increasing) the voltage on the busbars 29, but its output is a signal that is fixed for a predetermined time by the memory element 27 (26) and affects the change of the setpoint in. In the course of 18 (19), limiter 15 (16) is downward (increase: |), by an amount corresponding to the level of adjustment of the transformer St. - .iH. At the same time, the magnitude of the excitation current 28 was large (MeHbirje) of the new setpoint, at the output of the active limiter 16 (15), the signal h. Which goes to the second input of the logic element OR 7 (8) and the input of the logical element HR 9 (10). In this case, at the output of the element 7 (8) in the control channel 22 (23), the signal appears to decrease (increase: І1Ч1П1) of the generator excitation current.

At the output of element 9 (10) the signal n) is o-nadat. at the first input of the AND 5 (6) logic element, the Ci -nal also disappears, which deprives. 1O1 copic element 11 p), and in channel 24 (25) of control

no signal is received. After the excitation of the generator reaches the required level, the signal disappears at the output of the limiter 15 (16), at the output of element 9 (10) cc), it appears, this increases the () hydration of element 5 (6), in channel 24 (25) n () c.1 signal and РГ1Н will switch Jt line down of the transformer. At the same time, element 27 (26) 11 a.m 1i is shunted simultaneously. sigia at the output, it disappears, the setpoint at input 18 (19) of the limiter 15 (16) is restored to the same level, and the voltage control system operates as usual.

In connection with this. that blocking the cross. 1chipi of the transformer linkage is made only according to the characteristic of limiting, the proposed device allows to reduce the transfer time of the linkage of the transformer of the transformer and to avoid excessive influence on the excitation of the generator. This catches the reliability of the power plant voltage control circuit.

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Claims (1)

Invention Formula A power plant voltage regimen regulator containing a secondary voltage control system on the power station tires, consisting of a secondary voltage regulator on the power station tires, a reactive power distribution unit between generators, whose outputs through the first and second elements are NOT connected to the first inputs of the first and second elements And, respectively, outputs g which are connected to the nerve inputs of the first and second e, the OR elements, the outputs of which are, respectively, the channel outputs, and the Bo.biiie control of the excitation of the generators, restrict. 1st upper and lower excitation limits 0 1 generators, the first cat outputs (.) Are loose through the third and fourth elements are NOT connected to the second inputs of the first and second elements AND, respectively, and the second inputs from the second inputs of the first and second elements OR respectively. transducer voltage regulator (}) of the communication ormator, B1 1 whose inputs are connected to the inputs of the memory chambers of the Below. "Above, the switching of the branches of the communication transformer, HEELS) and the sixth elements NOT, two 0 is a lelengon time delay, the third and fourth elements I. of a block for changing the excitation current of i-generators, characterized in that. with goal; increase the speed by reducing the time of switching the branches of the tran-former. 5 communication and reliability, the outputs of the second-to-one voltage regulator of the power plant are connected to the third inputs of the first and second elements AND, respectively, the second outputs of the above mentioned limiters are connected to the inputs of the fifth and sixth elements, respectively, the outputs of which are connected to the inputs of the third and the fourth And elements, the outputs of which are the outputs of the channels "Below," above the switching branches of the communication transformer and connected to the second inputs of the memory elements of the corresponding channels, the output of the element ti Channel "Below is connected to the input of the setpoint of the limiter, the upper limit of the generator / excitation of the generators, and through the first time delay element with the second input of the third element And, and the output e. Channel 1 memory elements above are connected to the input of the setpoint, limit: the lower excitation limit of the generators and through the second element of the time stamp to the second input of the fourth stage, I.