SU1411882A1 - Method of controlling apparatus for coupling of power systems - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to increase the transmission power of the device for connecting two power systems in the presence of parallel power transmission, ensuring joint control of the machine voltage to the ground state of the asynchronized electromechanical frequency converter (AC EMF), reducing the probability of failures in the automatic reclosing action disconnected power line. To do this, the control systems of asynchronized synchronous machines (AFM) included in the ACE EMP system use the reference voltages of the connected power systems. In the event of overloading of the EMPCH speaker, parallel to it, the starting means, made as a rectifier and inverter with a DC link, is connected to it, and additional power is transmitted via the starting means. In the bridged state, one of the AFM maintains a predetermined voltage value, and the second AFM maintains a predetermined reactive power, with the measured reactive power of the first AFM being used as the reactive power setting. The AFM supplying the cantilever load is controlled using the reference voltage on the AFM buses and is frequency controlled, the setting being the set value of the power system frequency. 2 Cp-f-ly, 6 ill. with (/ С СХ) 00 hd

Description

The invention relates to electrical engineering, and more specifically to devices with TV for communication of power systems, and can be used to control a complex controlled connection- NIN power systems (CESES) based on an asynchronized electromechanical frequency converter (AC EMPCH) .10

The aim of the invention is to increase the communication capacity by increasing the pass-through power.

. these devices for the communication of two power systems; provision of joint control of machine voltage in the shunted state of the APS EMP; : increased likelihood of automatic re-activation from

 Klyuchvinoy LINE power transmission. 20

FIG. I presents an MSS block diagram containing an APS EMPCH with an adjustment system; in fig. 2 is a block diagram of the sensor unit of the control system; .on FIG. 3 - 25 structural parameters block of the settings; in fig. A - block diagram of the ACMj regulator in FIG. 5 - functional diagram of the key management unit of the AFM excitation controller; 30 in FIG. 6 - functional block setting. ;

The power grids and 2 are interconnected by two power lines (PTLs) in cutting one of which 5 is connected to an AC EMPCH, which is shunted by a switch 3. Actually, the AC EMPCH contains; power transformers 4 and 5, the primary windings of which through switches 6 and 7 are included in the section-40

1 ku. Lep; asynchronized machines (AFM), 8 and 9 with rigidly connected. shafts, stator windings of which

 through the switches 10 and connected to the secondary windings of the power LG

transformers 4 and 5; converter transformers 12 and 13 $ whose primary windings through switches 14 and 15 are connected to the secondary windings of transformers 4 and 5, the 16 and 17-frequency converters are directly connected, powered from the secondary windings of transformers 12 and 13, and the output circuits are connected to rotor windings of machines 8 and 9, on the common shaft of which there are also sensors 18 and 19 of the angular position of the rotors; starting means containing top j 0

five :

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The driver 20, the inverter 21, are connected by a DC link. Moreover, the switch with the help of switches 22 and 23 is connected to the secondary windings of transformers 4 and 5, and the inverter is connected to the stator windings of machines 8 and 9 using switches 24 and 25; controllers 26 and 27 of the AFM, including key control units 28 and 29, with the output circuits of the controllers connected to the input circuits of the converters 16 and 17; start-up controller 30, the output circuits of which are connected to the control circuits of the rectifier 20 and the inverter 21; blocks 3 and 32 of the settings, including blocks 33 and 34 of the overload restriction of each of the AFMs, with the outputs of the blocks of the settings connected to the inputs of the regulators 26 and 27, the AFM; blocks. 33 and 36 sensors, the inputs of which are connected to the outputs of sensors 18 and 19 of the angular position of the rotor, transformers 37 are 4 currents. A, voltage transformers 42 are 45, and pins 46 and 47 of the AFM rotor circuit, and the current transformers measure the currents respectively; 37 - through the switch, the switch 6 {38 - through the switch 7; 39 - through the switch 3j 40 - through the switch 10; 41 - through the switch 11; primary. The transformer circuits 42 and 43 of the voltage are connected, to cut the transmission lines on either side of the switch 3, and the transformers 44 and 45 of the voltage to the stator circuits of the APM 8 and 99, the outputs of the same blocks 35 and 36 of the sensors are connected to the inputs of the sets 31 and 32, regulators 26.27 and 30; the control unit 48 of the sims, to the inputs of which information comes from the blocks 35. and 36 sensors, as well as information on the status of all switches, the outputs of the control block 48 are connected to the blocks 35. and 36 sensors, with blocks 31 and 32 settings, as well as with all switches j, unit 49, diagnostic unit CUSES; - OUTPUTS — which are connected to the inputs of the control unit 48; control panel 50, whose inputs are connected to the control outputs 48; outputs which are also connected to the inputs of the control panel 50 J channels 51 and 52 of information transfer, the outputs of which are are connected to the inputs of blocks 35 and 36 of the sensors and the blocks 31 and 32 of the workshops, the inputs of channel 5 connect. 3

the current transformer 53 primary windings / primary windings of which are connected to the head section of power lines with the EMPS AC from the power system 1, and the secondary windings of the voltage transformer 54, the primary windings of which are connected to the power system buses 1, the inputs of the channel 52 are connected to the secondary windings of the transformer 55 current, the primary windings of which are connected to the head section with power lines from the APS EMPCH on the power system 2 side, with the secondary windings of the voltage transformer 56, the primary windings of which are connected to the energy buses the system 2, as well as with the secondary windings of the current transformer 57, measuring current through power transmission lines without AC EMF.

FIG. 2 shows a block diagram of a block of 35 sensors. The block includes: blocks 58-63, which convert three-phase input signals into two-phase, to whose inputs output signals from the angle position sensor 18, voltage transformers 41 and 42, current transformers 37.40 and 39 are applied; sensor 64 currents excitation (rotor) AFM, to the input of which two-phase signals from the output of the shunt 46; sensor 65 of active power transmission lines without ACE EMPCH, the input of which is connected to the output of channel 52, on which there is a signal received from current transformer 57; a phantom circuit 66 for calculating the voltage value of the secondary windings of the power transformer 4, the inputs of the circuit 66 are connected to the outputs of blocks 60 and 61; devices 67 - 71, which separate modules of input values, to the inputs, which receive two-phase signals from the outputs of the blocks 59.60 and 62, respectively, of the phantom circuit 66 and the current control sensor 64; sensors 72 (not shown) and 73 active and sensors 74 and 75 of reactive power, with the inputs of sensors 72 and 74 receiving the output signals of blocks 60 and 61, and input inputs of sensors 73 and 75 receiving input signals of blocks 60 and 63; block 76 of the reference sinusoids, consisting of the normalization scheme and the formation of an independent sinusoid, the output of which signals (one or switched with

18,824.

keys on the operator's signal) are the output signals of block 76, to the inputs of which, through the closing 5 keys 77 and 78, two-phase high signals (single signals from the output of channel 5 and block 60; sensor

79 frequency power system 1. and sensor

The 80 rotational frequency of the rotor, whose input signals are output-.

Nv two-phase signals of blocks, respectively, 76 and 58; amplitude rationing unit 81, the input of which is connected to the two-phase output of the unit

5 58; sensor 82 synchronous projections of the rotor currents of the AFM, the inputs of which are connected to two-phase outputs of blocks 59.62 and 76; a phase meter -83, to the inputs of which are fed through closing keys 84 - 87 two-phase output signals, respectively, of block 59, block 76, phantom circuit 66 and the corresponding block from a block of 36 sensors similar to block 60 of

5 units of 35 sensors. The outputs of the block are the outputs of the devices 67 - 71, the blocks 60.76 (two-phase), 81 (two-phase), the sensors 64 (two-phase) 65.72 - 75.79.80.82 (two-phase),

0 fazo14etra 83.

FIG. 3 shows the block diagram of the block 31 settings. It includes: setpoint potentiometers 88 - 92 and 93 for the formation of independent settings for the value and voltage angle, active i and reactive. POWER and coefficients of regulation-. neither and} about the AFM controller; functional blocks 94 and 95, the first of

n which forms the optimal charter

KU taking into account the overload of the head sections of the power lines from the APS of the EHP AC by the signal about the flow through the transmission lines without the APS of the EHP, and the second supports its output signal,

- equal to the input, if the slip of the AFM is within the allowable limits and changes the output signal in proportion to the difference between the current slip value and the allowed one, if the current value exceeds the allowable one, and also limits its output signal to the allowable limits, and the inputs 94 from the output of the device 65 in the block 35 of sensors and signals about the currents of the head sections, and the output of the block 94 is connected via a closing key 96 With the first input of the block 95, to which is also connected via a disconnecting

.clock 97 is the output of potentiometer 90, and the output of block 95 is connected to potentiometer 98, the other two inputs of block 95 are connected to the outputs of sensors 79 and 80 of block 35 of sensors; a servo drive 99, the input of which is connected to the output of the overload limiting unit 33, and the output is mechanically connected to the potentiometer 98, thereby adjusting the active power setting of the AFM when the stator or rotor current overloads; inertial links 100 and 101, the inputs of which are connected respectively to the output of the corresponding sensor from a block of 36 sensors, similar to sensor 74 from block 35 of sensors and to the output of sensor 79 from block 35 of sensors; threshold elements 502 and 103 ,. reacting to the output beyond the permissible limits of the input value; differentiating element 10A, the input of which is connected to the output of the threshold element 1.02, the input of which in turn is connected to the output of the phase meter 83; element 105 of sampling and storage, storing the input signal by the signal at the control, the input, its input connected to the output of the inertial link 101, and the control input - with the output of the differentiating link lOAg amplifiers 106 and 107, the inputs of the first of which are connected to the date outputs ™ 79 (with a + sign) from a block of 35 sensors and a sensor similar to it (with a sign -) from a block of 36 sensors and the second inputs are connected to the output of a sensor 79, similarly to a sensor from a block 36 and a threshold element, LOZ, whose input is connected to the output of the amplifier 106, forming sig cash Proportional to the frequency difference of the connected power systems, the amplifier 107 generates at the output a setpoint signal for the rotor speed equal to the half sum of the frequencies of the connected energy systems. Plus the value determined by the field element, which excludes the operation of AFM with close to zero slides. The outputs of the setpoint block 31 are the potentiometer outputs 88, 89.92, 93 and 98, the sampling and storage element 105, the amplifier 107, and either the output of the potentiometer 91 supplied through the release key 108, or the output of the inertial link .100, supplied through the locking key 109

Key management 108 and 109 is performed on the same operator signal, as well as key management 96 and 97 on another operator signal.

Fig. 4 shows a block diagram of the controller 26 of the AFM. It, in turn, consists of three blocks - a control function block 110, a coordinate conversion block 111 and an output amplifier block 112,

The input signals for block 110 are the corresponding output signals of blocks 35 and 36 of the sensors and block 31 through the closing keys or directly. The keys are controlled by the outputs of the key management unit 28. Block 110 consists of two PID controllers 113 and 114, two summing amplifiers .115 and 116, and amplifier 117 for start and stop modes, the inputs of which are connected to the outputs of potentiometer 88 from setting block 31 (with a + sign) and device 68 from a block of 35 sensors (with a sign -).

The proportional 118 and integral 119 parts of the first PID controller of torus 3 are served with the + sign

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the following output signals: from potentiometer 98 — via key 120, from switches and 7 — via key 121, from potentiometer 89 — through key 122 from element 105 — through key 123, from the corresponding sensor from 36, similarly to sensor 79 from the unit 35 - via key 124.

On proportional 118, integral 119 and differential 125 parts of the first PID regul. Torah 113 is served with the sign - the following are you; signals from sensor 79 through key 126, from sensor 80 through 127, from sensor 73 through key 1285 from sensor 72 through key 129 from phase meter 83 through key 130,

The proportional 13 and integral 132 parts of the second PID controller of the torus 114 are given the following output signals with the -I- sign; from the corresponding device from block 36, similar to device 68 from block 35 — via key 133, from potentiometer 88 — via key 134, from potentiometer 91 or inertial link 100 — via key 135 from device 70 — via key 136, and from the sign is the following: from device 67 through key 137, from sensor 75 - through key 138 / from device 68 - through key 139, from sensor 74 - through key 140.

In addition, the signals that pass the keys 139 and 140, with the - sign, are fed to the inputs of the differential part 141 of the second PID controller 114, as well as the signal that passes the key 133 with the + sign.

The inputs of the amplifier 115 with the + sign are output signals from the proportional 118, the integral 119 and the differential 125 parts of the PID controller 113, the sensor 79 and the potentiometer 92, and the sign - from the sensors 80 and 82 (one of its phases).

The inputs of the amplifier 116 with a sign are output signals from the proportional 131, integral. 132 and the differential 141 parts of the PID controller 114 and from the potentiometer 93 and with the sign - - from the sensor 82 (its other phase).

The inputs of the coordinate conversion block 111 receive the output signals of the amplifiers 115 and 116, blocks 76 and 81. In the block, 1 1 1, the output signal of the blocks of the control functions of the control functions is first multiplied by the stator voltage reference vector, and then by the rotor angular position vector, whereby a control signal (the signal at the output of block 111) is generated at the frequency of the slip of the AFM.

The output amplifier unit 112 contains two amplifiers 142 and 143, to the inputs of which + is given the output signals of the coordinate conversion unit 111 and with the sign - the output signal of the sensor 64: first phase - to input 142, second phase - to input 143.

The outputs of the AFM regulator 26 are either the outputs of amplifiers 142 and 143 connected via break switches 144 and 145, or the output of amplifier 117 connected respectively via short-circuiting keys 146 and 147, the keys 144-147 being controlled by the same signal from key management unit 28. The outputs of the controller 26 are connected to the SIFU frequency converter with a non-mediocre connection.

FIG. 5 shows the functional diagram of the block 28 control key

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Chami. The inputs for it are the outputs of mode control unit 48. It consists of the element NOT 148, the elements AND D49 - 151 and the elements OR 152 - 163,

The output signals of the unit 28 are connected to the inputs of the regulator 26 following signals:

h - setpoint for active

power

h, - setpoint w | and feedback signal and frequency of response; hj is the ijx setting reference and feedback signal & .. by

i stress angle; h is the signal of the frequency of another power system;

hg is the memorized signal W, from the output of element 105-;

hg - signal about the frequency of the power system;

h - feedback on the active RS and the reactive RS of the scissors through the shunt AC EMPCH switch;

hg is the feedback P, on the active power of the AFM;

ha - feedback feedback 5

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l:

ten

and other ACM; setpoint U

by

eleven

ma

stress;

-installation of task Q for reactive power;

- voltage signals on the stator of the AFM uj and on the secondary winding of the power transformer and,;

hjj is the feedback U over voltage; h .. is feedback Q for reactive power. The output signal h switches the keys 144–47. The remaining output signals make exceptions in the block 35 of clamp sensors: h, 5 - switch key 87 {

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five

Vfr

17

19 19

 l

- key 85;

84; 77;

- ".

78; 86

Consider the operation of block 28 in various modes:

a) Normal mode.

Signal H closes key 26 in controller 26 (via elements 155, 157, and 154), 134 (155 and 157), and

either 12 and 127 (via 156.149 and 152 if from block 48, along with signal H, another signal comes (signifying frequency control), or 120 (through 151) and 129 (through 15.1 and 163), if instead of signal H from block 4.8, the signal M will come (meaning Control Active Power),

In the sensor unit 35, the key 77 closes (via the direct output of the element 16.2). In all other modes, except K, the key 77 is open, and the key 78 is closed (through the inverse output of the element 162),

b) Mode on the console machine.

At the signal K in the controller 26, the keys 123 (directly) 26 (through 158), 134 (155 and 157) and 139 (155, 157 and 154) are closed;

c) Mode on the console machine.

At the signal K in the controller 26, the keys 121 and 127 (through 152) 134 (155 and 157) and 139 (155, 157 and 154) are closed. In block 35, the sensor closes key 77 and opens 78 (after 162);

d) Sync mode,

 Signal C in controller 26 closes keys 122 and 130 (through 160) 136 and 137 (directly).

In block 35, the sensor closes key 86 (directly by signal C) and opens 85 (after 148).

e) Unloading mode.

The signal P in controller 26 closes the keys 140 (through 153) and 129 (through 153 and 163).

e). Compensator mode for one machine.

The signal A in the controller 26 closes the keys 139 (through 161, 157, and 154), 134 (161 and 157), and 121 and 127 (through 152).

g) Compensator mode for two cars.

at

On signal A, in the controller 26, the keys are either 12 or 127 (through 156.449 and 152), 134 (156, 149 and 157) and 139 (156, 149, 157 and 154), or 135 (through-150), 140 (150 and 153) and 129 (150, 153 and 163). In the first case, along with A, there is also a signal H, in the second case, a signal M.

h) Bypassing mode. The signal RSH directly in the controller 26 closes the keys 128 5 and 138.

i) Console machine mode bypass.

The signal U in the controller 26 closes the keys 126 (through 158) and 124 10 (directly), 134 (155 and 157) and 39 (155, 157 and 154).

k) Non-console machine mode when bypassing.

The signal W in controller 26 locks the keys 139 (through 154), 122 and 130 (through 159 and 160) and 133 (directly).

In sensor unit 35, key 87 is locked and key 84 is opened (respectively, via the direct and inverse outputs of element 159, respectively).

Modes and and to in combination provide shunting in console mode. , 25) Shunting of the AC EMPCH in normal mode.

The signal W in controller 26 closes the keys 122 and 130 (through 159 and 160), 134 (161 and 157) and 139 (161, 30 157 and 154).

In the block, 35 sensors close, key 87 and open 84 (after 159). Modes of k and l in combination provide shunting in normal mode. m) Starting and braking modes.

The signal P directly in the controller 26 closes the keys 146 and 147 and opens the keys 144 and 145.

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In all modes except W and W in

block 35 sensors closed key 84 (through the inverse output of the element 159),

In all modes, except C, in the block of 35 sensors, the key 85 is closed (through d5 element 148). ,

FIG. 6 shows the block diagram of block 94, which forms the optimal setpoint for the flow of active power through the EMPCH automated control system, taking into account the load on the main sections of the power transmission lines with the electric treating device. It consists of an optimal setpoint block 164, summation elements 165 - 167, and asym-. , metric amplifiers I6 & and 169; The input of the forming unit is connected to the output of the sensor 65 of the active power of the power transmission lines without ACE EMPCH. At the inputs of elements 165 and 166, setpoints are applied that are equal in parallel to the permissible current values of the currents.

head sections and signals of currents in the head sections of power transmission lines with the APS EMPCH from the power systems, respectively, 1 and 2.

The outputs of elements 165 and 166 are connected to the inputs of single-ended amplifiers, respectively 168 and 169, the outputs of which, like the output of block 164, are connected to the inputs of element 167, the output of which is the output of block 94.

When measuring and transmitting the reference vector of the connected energy systems, the limit of the static and dynamic stability of the MCC is significantly increased. In this case, it is possible to transmit the power exceeding the rated power of the AC EMPCH. The presence of a starting means, made as an inverter with an inverter with a DC link, allows this additional active power to be transmitted when the specified starting means is connected in parallel with the APS EMP and its control is similar to the regulation of the DC injection. In practice, starting means for an APS EMP requires starting means with a power of 10% of the nominal value of the APS EMPCH. Thus, using the present invention it is possible to increase the throughput of KUSES by J0%.

Increasing the capacity of the CUSES allows it to be used more fully to regulate the flow distribution over the intersystem communication. In normal modes, it is possible to form the active power setpoint as a function of the overflow through the parallel communication with limitations on the transmitted power limit zi

In post-accident modes with the formation of cantilever loads, it is possible to provide power to consumers, the power of which also exceeds the power of the EMPCH AC by 10% of the nominal. In this mode of operation, the AFM supplying the cantilever load is transferred to control by its own supporting vector, and the other machine is controlled by the supporting vector of the connected power system, which makes it possible to connect the starting means and thereby transmit additional power.

Changing the principle of control of the EMPCH AC with the use of the reference vectors of the connected power systems

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Q

5, 20 25 Q

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55

A change was made in the recognition algorithm for the console mode. The recognition of the console mode can be measured and controlled by the phase difference between the reference vector and the voltage vector on the AFM busbars. If the indicated phase difference goes beyond the permissible limits determined from the normal modes of operation, then the console mode can be unambiguously judged.

As well as in normal operating modes, the use of starting means allows to provide power to the consumers of cantilever load, the power of which exceeds the power of the EMPS. If the total throughput of the EMPCH AC and start-up means is insufficient, then the complex is shunted and the EMPCH AC is switched to the reactive-power compensator mode. In the wound-up state, in order to avoid the mutual influence of the voltage regulation channels, one of the EMPC AC machines needs to be transferred to control reactive power, and for uniform loading of the AFM, the reactive power installation is formed equal to the AFM reactive power controlled by voltage.

After the restoration of the electric communication, the shunting of the CUSES and the transition to the previous mode are performed manually. But since such a transfer may be slow, an automatic transition is provided, which is organized upon the fact of overloading the head sections of communication.

Presented - device -. An example of a specific implementation of a method for controlling a device for the communication of two power systems operating as follows.

In normal operation, the shunt switch 3 is turned off; for the AFM 8 control system, the reference vector of the connected power system is measured by the voltage transformer 55 and transmitted by the transmitter 51 to the television channel. The receiver 53 receives the specified reference vector, which then enters the sensor unit 35 (the key 77 is closed, and the key 75 is opened due to the control signal h, g and from the key management unit 28) to the input of the block 76 of the reference sinusoids, from the output of which

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25

1, the reference vector ijjcn is fed into the controller 26 of the AFM 8 ijia one of the coordinate converter banks, Ai. For the AC control system g, the reference nector of the connected power system, measured by the voltage transformer 56, is supplied. The mode for the active power of the EMPCH AC is determined in a block of US-I1OK units. using the functional blocks f 14 and 95 on the basis of information about the current 11L-50p kV, measured by the current transformer 57, taking into account the throughput of the main communication sections J20 kV. Voltage settings are determined by potentiometer 88 in blocks 21 and 32. In normal mode, the AFM controllers maintain the setpoint of active power and voltage values set on the AFM busbars, while the shaft rotation frequency is maintained equal to the average frequency of the reference vectors. A setpoint for the shaft rotational speed is generated in the Spock 31 setpoints by adders 107 and 106 of the threshold element 103. An overload of the EMPH rotor or stator circuits is detected in the block (8 mode control based on information about the stator current modulus (block 69) and the rotor (block 7) of sensor units of operating parameters 35 and 36. When an EMPCH overload occurs, the mode control unit 48, depending on the direction of power flow, connects an EMPCH parallel to the EMPCH start-up with | redsgo by means of 22 C switches 25 or 23 and 24, and also realizes the perestroika with the regulator CPRR 3JO on the law allowing the transmission of active power to L |. If there is no ASM overload,

1JO KUSES will work in such a mode (it will have until the setpoint on the effective power becomes less than the nominal power of the EMPSh. If the rate on active power is so high that the connection HP allows you to eliminate the load on the EMPCH machine, it requires cjOBMecTHO with connecting the start-up device to limit the setpoint for the active power and voltage. The proposed device provides for 33 and 34 overload limitations, 55 of which only affect setpoint to | y on active power with the help of a wireless 98, pack Aulus emogo servo--.

4P882

driven reloading of the APS EMP,, or

thirty

35

40

45

50

t n

no output

or 169, in block 3, the settings are increased by n through the AU (a generator according to the setpoint if it is a machine with a head control that reduces the pressure and the unloading of the opposite of the machine 35 and the output vector of the signals and the output In a blink of a while, the long-term envelopes of the chassis and x on the 101 bl came 48 controls turning on 77 in b signals the key of the reference can be hulled, hg, hg 5 h h) the storage system and the storage and storing OC frequency in whether the second regulator control unit

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g

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driven reloading of the APS EMP,, or

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14

99 blocks 31 head sections i. ever i

setback When power lines with

ne i

g,

signal appears on

t N t

  2 output unbalanced amplifier 168

or 169, of the function block 94 in the setpoint block 31, the first of which increases the absolute value of the setpoint by. the flow of active power through the EMPCH AC, if it is positive (the generator mode of the machine is equal to the active power), and decreases the set point by the absolute value, if it is negative (the motor mode of the machine), while the head section is unloaded from the side of the machine, controlled in power, the second reduces the setpoint in the generator mode — and increases in the motor, unloading head portion with the opposite side for the power controlled side of the machine. Constantly in nominal modes, the phase meter 83 of sensor blocks 35 and 36 measures the phase difference between the reference vector and the voltage vector on the AFM buses, the information enters the setting blocks 31 and 32 ramp threshold element 102, the output of which signals the onset of the console mode and enters In the mode control block 48, the frequency level in the power system is stored simultaneously for long-term storage using the differentiator 104, the sample and storage element 105, and the inertial link 101 of the settings block 31 of the solar mode, the mode control block 48 by turning on the key 78 and turning off the key 77 in the sensor block 35 (output signals, h, l of the key control block 28) implemented: t switching of the reference vectors on the machine feeding the cantilever load, One-time occurs changing the regulation law (by the output signals hg, hg 5 h (o 5 hj. key management unit) of this machine to the law ensuring maintenance of frequency equal to the memorized frequency of the power system and stored in the sample and storage unit of the setting unit 105. The second machine regulates the frequency of rotation of the shaft, while if the second AFM is in pre-accident mode; it regulates the active power, the mode control unit gives out

the input of the key management unit 29 is the signal P (instead of M, and 29 switches the control law with the help of the output signals

2 w o This is the power of the cantilever load with the nominal power of the EMPCH AC, just as in normal mode, upon start of the overload, the starting means will be connected and will transmit additional power in the required direction.

If, in the console mode and with the starting means turned on, there is an overload of the AC EMP machines, it is necessary to conduct the AC EMP by means of turning on the switch 3 and switch the EMP AC to the reactive power compensator mode. In the shunting mode, the ACC EMC machine operating on the cantilever load is removed at a mutual angle between the voltages on the AFM buses, which is done by turning on the key 87 and turning off the key 84 in the corresponding sensor block by signals of h and b respectively from control unit 28 keys. In addition, the mutual frequency control of the signals h4 and h is turned on and the voltage on the EMF busbars is fitted to the output signal hj and h, j from the key management unit 28. After turning on the bypass switch 3, the authorization signal from the autosynchronizer of the mode control unit 48 is used to switch the EMPS to the compensatory mode by the signal h from the key management unit 28. In this case, in order to eliminate the mutual influence of the reactive power channels, one of the machines is transferred to the control mode by reactive power by means of the signals L and H from the key management unit 28, and the setpoint is formed by the inertial link 100 of the settings unit 31, to the input of which - c is the reactive power of another machine controlled by voltage. In this mode, both machines are controlled by the reference vectors of the AFM busbars.

Thus, the proposed method is wired with a device for connecting two power systems, comprising an EMPShE AC and start-up means, made as an inverter with a rectifier and with a DC link, by connecting in parallel the ACE EMPCh starting means, connection of two power systems by 10% and thus more fully utilize the installed equipment.

Claims (1)

1. A method for controlling a device for the communication of two power systems containing an asynchronized electro-frequency converter 5 (ACE EMPCH) of two, asynchronized synchronous machines (AFM) with rigidly connected shafts and starting, means, which measure the power of one of the machines, form the setpoint for active power, generate a control signal that provides maintaining the measured active power of one of the machines is equal to the set point; the voltages are measured at 5 bus EMPCH, form voltage settings, form control signals to ensure that the measured voltages are equal to the corresponding settings, the reference voltages are measured to form the EMPC AC control functions, the frequencies of the specified reference voltages are measured, the rotation frequency is measured shaft, form the control signal, providing the frequency of rotation of the AC EMPCH shaft equal to / average frequency of the reference voltages, measure the established frequencies of the connected power systems, measure the occurrence of the console p nezhima Q and upon the occurrence of its transfer the regulation of the EMPCH AC to the regulation law in the console mode, ensuring the maintenance of the frequency equal to the setpoint, is shunted 5 EMPCH AS in the console mode and put it into the reactive pug condition compensator mode, which is different from the fact that, in order to increase the communication capacity of the PUP in order to increase the transmission power of the device for the connection of two energy-. in the presence of parallel power transmission, they additionally intend and transmit to the installation site of the APS EMPCH the reference voltages of the connected power systems, measure and transmit to the installation site of the APS EMPCH the currents of the parallel transmission and head sections of communication, measure the phase differences IU .G FC & 9