CS214940B1 - Automatic optimized parameter control of the remote control transmitter - Google Patents

Abstract

Automatic optimized control of parameters of a mass remote control transmitter. The purpose of the invention is to limit the peak power load of the device. Virtually no operator is required for the operation of the transmitter, since all changes in the network impedance, while taking into account the ambient temperature, are captured in the test pulse. The control method is based on the instantaneous values of the high-voltage (HV) network impedance and phase, determined during the test pulse, which are entered as impedance loading values for calculating the optimal value of the coupling transformer capacity of the converter output circuit, the ambient temperature value and the signal level value on the high-voltage (HV) network during the test pulse. These data serve as instantaneous input values when controlling the HDO transmitter, the central member of which is the control and computing block.

Description

(54) Automatic optimized control of mass remote control transmitter parameters

Automatic optimized control of mass remote control transmitter parameters.

The purpose of the invention is to limit the peak power load of the device. There is practically no need for the operator to operate the transmitter, since all changes in the network impedance, taking into account the ambient temperature, are captured in the test pulse. The control method is based on the instantaneous HV and phase impedance values detected during the test pulse, which are entered as the impedance load values to calculate the optimal value of the converter output circuit coupling transformer, ambient temperature, and the HV signal level. vn) at test pulse. These data serve as instantaneous input values when controlling the HDO transmitter, the central element of which is the control and calculation block.

The present invention relates to the automatic optimized control of the parameters of a mass remote control transmitter with a coupler in the form of two coupled oscillating circuits and a static converter with a constant operating frequency commuting by means of this coupling. *

The design of a mass remote control transmitter with a static frequency converter commuting by means of two oscillating coupled circuits of a coupler has some disadvantageous characteristics, especially at the high power requirements for the high-voltage networks to which it is transmitted and where the coupler is outdoor. Adjusting the transmitter parameters to the MV / MV impedance of the network to which it is transmitted is usually done by changing the capacitor coupling capacitor capacity. In case of changes in the impedance of MV / MV network and required level of tone signal of the collective remote control system, it is necessary to perform the operation of the operator, who checks the signal level according to the prescribed regulation or unlocks the transmitter protections. . Because the transmitter coupler is exposed to outdoor conditions, it operates in an environment with significant temperature changes that inherently cause changes for the operation of the decisive coupler parameters, in particular the change in the resonant frequency of the MV, MV side of the coupling, and the capacitance of the MV coupling capacitor, the MV side of the coupling, through which the inductance of the secondary winding of the coupling transformer is connected to the MV, MV grid. The instantaneous value of the intrinsic resonance frequency of the MV, MV side of the coupling is then between the minimum and maximum limits, which are determined by the coupler ambient temperature range and the design of the capacitors that make up the MV / MV coupling capacitor capacitance or the coupling transformer. The optimal setting of the coupling capacitor of the output circuit of the inverter before the actual transmission of the telegram is therefore primarily dependent on the instantaneous magnitude and nature of the MV, MV network impedance of the coupler load and other coupling parameters. at outdoor temperature. These facts then have unpleasant consequences in the actual operation of the transmitter. The point is that it is not possible to exclude in operation a state where the impedance of the MV and MV grid changes from a low absolute value to a substantially higher one.

In this case, and especially in a state where the intrinsic frequency value of the MV, MV side of the coupling is close to the minimum, the optimal values of the coupling capacitor of the output circuit of the inverter vary considerably for the low and high absolute impedance values. This means that considering the variation of the MV / MV network impedance, the inverter output capacitor coupling capacitance in the current operation remains at the original value required for the desired signal level at a low MV / MV network impedance absolute value, thereby increasing substantially this absolute impedance. the coupler behaves as an impedance with respect to the output terminals of the inverter with a significantly smaller absolute value than the lowest permissible. This means a considerable current overload of the static converter and the necessity of blocking the transmission, eventually equipping the overcurrent protections with further necessary manipulation of the change of the capacitor capacitance value of the converter output circuit. So far, these operating states have been solved by the transmitter protection function and the consequent need for a gradual so-called transmitter tuning, a considerable transmission delay, which in certain cases can have significant adverse consequences for the operation of the controlled power system.

These disadvantages are overcome by the proposed method of engaging automatic optimized control of the parameters of the remote control transmitter according to the invention. Its principle consists in that the control and calculation block of the transmitter with inputs for receiving the telegram of the remote control system and for input of the transmitter input parameters is connected via one output via a static converter and a coupler to the MV / MV network. MV / MV networks, MV / MV network phase sensor, and HV / MV network tone sensor, connected to a transmitter control and calculation block, also connected to an ambient temperature sensor. The second output of the control and calculation block is connected via the actuator to change the capacity of the inverter output circuit to the coupler.

This method of controlling the transmitter operation in the embodiment substantially reduces the peak power load of the device, and virtually no operator is required to operate the transmitter since all network impedance changes while considering ambient temperature are captured during the test pulse by the minimum capacitor coupling capacitance of the output circuit. The above-mentioned unpleasant states cannot occur for any high-voltage, high-voltage network impedance from the working range of the designed transmitter. At the same time, the signal level at the MV / MV network is within the maximum and minimum range of tone signals, which has an adverse impact on the reliability of the whole mass remote control system in a given area of power system control - both for proper receiver operation. signal, as well as the insensitivity of receivers in crosstalk signal.

In the drawings, FIG. 1 shows the circuit according to the invention, and FIG. 2 shows the coupler of the circuit.

In Fig. 1, the control and calculation block of the transmitter 1 with inputs 2 for receiving the control telegram of the mass remote control system and for entering the input parameters of the transmitter 3 is connected via one output via a static converter 5 and coupler 6 to the HV network 7 a control and calculation block 1, which is also connected to the ambient temperature sensor 8, is connected via the HV impedance sensor 9, the MV phase MV sensor 10 and the tone signal sensor 11 on the MV MV circuit 7. The second output of the control and calculation block 1 is connected via the capacitance change actuator 4 to the coupler 8.

Before transmitting the telegram of the remote control itself, a test pulse is sent in which the capacitor coupling capacitance value of the inverter output circuit is Cl == Cl min, the smallest of the possible range of Cl min. Cl <Cl max.

In this range, the capacitor coupling capacitance of the output circuit of the inverter C1 can be varied in steps. During the test pulse, the instantaneous absolute value of the MV / MV impedance of the grid is determined [Zs | and the network phase $ js of the network impedance vvn, vn, zs, at the same time the signal level on the vvn, vn network at the test pulse Ut tes _T is also evaluated. The ambient temperature of the environment where the couplers are located is continuously measured. These data serve as instantaneous input values when controlling the ripple control transmitter. The central member in the proposed transmitter control is the control and calculation block 1, in which the basic input data of the transmitter parameters are stored, namely:

1. Operating frequency f.

2. Static converter output voltage Ul.

3. Minimum permissible absolute value of the load impedance Z1 of the static converter 5 (minimum possible absolute value of the coupler input impedance 6 - | Z11 min.

4. Minimum permissible commutation angle of the load impedance Z1 of the static converter 5 - χ min.

5. The value of possible capacitor coupling capacitor capacitance changes in the output circuit of the inverter from Cl min. to Cl max - Δ Cl.

6. Value of quality factor of circuit L2, C2

- Q2.

7. The value of the quality factor of circuit L1, Cl

- Ql.

8. Value of coupling factor - *.

9. Mean measured value of inductance of primary winding of coupling transformer L1.

10. Mean value of inductance of secondary winding of coupling transformer L2.

11. The value of the capacitor capacitance of the MV, MV side of C2 coupling, corresponding to the mean measured natural resonance frequency of MV, MV side of coupling f2 from the band <f2 min .; f2 max.> - Czs.

12. Minimum permissible level of tone signal Ut at the point of connection of the transmitter to MV, MV, mains - Ut min.

13. Maximum permissible level of tone signal Ut at the point of connection of the transmitter to MV, MV, mains - Ut max.

The control method is based on the instantaneous HV impedance, HV impedance of the Žs - Žs network and the phase of the gss network detected during the test pulses, which are entered as load impedance values to calculate the optimum capacitor coupling capacitor capacitance signal levels on the MV / MV grid at the test pulse Ut _TE sT · The phase angle value of the grid

AND

9> s impedance of MV and MV network Zs is decisive in correcting the commutation angle input χ for calculating the capacitor coupling capacitance value of the output circuit of the inverter Cl. The ambient temperature value ů is decisive for the correction of the natural resonance frequency parameter vvn, vn of the coupling side f2, the value of the signal level on the vvn, vn network at the test pulse Ut _TEST determines whether to transmit without needing to calculate the capacitor coupling capacitance value or whether this calculation is necessary.

The procedure for parameter optimization is as follows:

a) The telegram from the local or central automatics is recorded in control and calculation block 1 in the first phase of the control, which first sends a short test pulse at which the capacitor coupling capacitance value of the inverter output circuit is Cl = Cl min.

bj after the test pulse is transmitted, the signal level on the MV / MV network is evaluated first, ie Uplest, in terms of the minimum permissible tone signal level Ut min .: bij Uplest Ut min. = followed by an immediate transmission of the received telegram b2j Read Tue min. - This is followed by the calculation of the optimal value of the capacitor coupling capacitance of the output circuit of the inverter C1

c) In case of b2) the input data are first corrected when entering, namely the commutation angle χ min. according to the network phase value tps and when entering the capacitance value of the MV, MV side of coupling C2 or L2, according to the functional dependence of the natural resonance frequency of the MV, MV side of coupling f2 at ambient temperature &.

d) after correcting the input data, the theoretical value of the capacitor coupling capacitance of the output circuit of the inverter Cl is corrected to the lower nearest real value corresponding to possible changes in the transmitter design in correction block 1. The value of the calculated and corrected capacitor coupling capacitor capacitance of the inverter output circuit C1 is carried out considering the appropriate commutation ratios given by the commutation angle γ min, considering the possible inverter load, given the absolute minimum load impedance of the static inverter output | Zl | min, and considering the dependence of the decisive parameters of the coupler B on the ambient temperature t>.

Claims (1)

SUBJECT Automatic optimized control of mass remote control transmitter with coupler in the form of two coupled oscillatory circuits and a static converter with constant operating frequency commuting by this coupling, characterized in that the control and calculation block (1) of the transmitter with inputs (2) for receiving the control the telegram of the mass remote control system and for entering the input parameters of the transmitter (3) is connected via one output via statics) after the calculation the control and calculation block 1 passes the instruction to the actuator . f) After setting the capacity value of the coupling capacitor of the output circuit of the inverter Cl, the received telegram is transmitted. g] If additional telegrams from the local or central automatics come during the calculation, they are recorded and transmitted sequentially after the setting of the coupling capacitor capacity value of the output circuit of the inverter C1. h] After the transmission is finished, the basic value of the capacitor coupling capacitance of the inverter output circuit Cl = Cl min is automatically reset. a high voltage converter (5) and a coupler (6) to the MV network (7), the MV to which the network impedance (7) MV, MV, network phase sensor (10) (7j MV, MV, and (11) a tone signal on the HV (HV) network (7) connected to a transmitter control and calculation block (1), also coupled to an ambient temperature sensor (8), the second output of the control and calculation block (1) connected via an actuator ( 4) changing the capacity of the inverter output circuit per coupler (6).