SU1372463A1 - Method of automatic control of overflow of power between two parts of power system - Google Patents

Abstract

This invention relates to the field of electrical engineering. The purpose of the invention is to increase the efficiency and accuracy of regulation. For this, the value and sign of the deviation of the power flow is memorized. The current value of the magnitude of the deviation of the power flow and the rate of dynamic increase at each time point are determined. If the value of the level of the deviation of the flow is less than the specified value, the gain of the integral component of the control is increased. If the value of the dynamic increase indicator of the flow deviation is less than the specified one, the gain factors of proportional and differential control will be reduced. 1 il. % (L

Description

The invention relates to electrical engineering.

The purpose of the invention is to increase the efficiency and accuracy of regulating the flow of active power through the power line connecting the two parts of the power system.

The invention solves the problem of the operative adaptive correction of the parameters of the proportional, differential and integral components of the regulation depending on the nature of the current changes in fluctuations of the power flow through the interconnection system.

The drawing shows a block diagram of the device that implements the proposed method.

The device contains an adjustment setpoint adjuster 1 and a sensor 2 of the current value of the active power flow, the output 61 of which is connected respectively to the first and second inputs of the first comparison unit 3, the output signal of which is fed to the first inputs of blocks 4-6 multiplying respectively the circuits forming proportional, differential and integral components of the action, on the input of the block 7 for determining the sign of the deviation of the overflow, on the first input of the block 8 for determining the value of the rate of change of the deviation value, on the second input otorrhea is supplied with a sign signal output unit 7, to a first input level determination unit 9, and the offset value to the input of storage unit 10, the output of which is coupled to the second input unit 9 for determining the level values deflection power flow. From the output of block 8 for determining the value of a dynamic indicator characterizing the process of the current change in the magnitude of the flow deviation, a signal is fed to the input of the second comparison unit 11, the output of which is connected to the block 12 for correcting the parameters of the circuits forming the proportional and differential components of the action from the first output of block 12 a signal is sent to the second input of multiplication unit 4 proportional to the component, and from the second output to the second input of multiplication unit 5 of the differential component associated with the input of the unit ka 13 differentiator. The output of block 9 is connected to the input of the third comparison unit 14, from the output of which a signal is applied to

a unit 15 for correcting the parameters of the circuit forming the integral component of the action. A second input of a block 6 is connected to the output of block 15, from the output of which a signal is fed to the input of an integrating block 16, C outputs of blocks 4, 13 and 16 are fed to the first, second and third inputs of adder 17, respectively, to which the output knob 18 is connected loads of regulatory power plants, each output of which is associated with a power controller of the corresponding power plant.

The method is implemented as follows.

At the output of the first comparison unit 3, as a result of comparing the current (actual) value of the flow of active power P, coming from sensor 2, with its set value PJ from setpoint 1, a signal is output proportional to the amount of flow deflection. The signal from the output of block 3, proportional to the magnitude of the current deviation of the overflow lp, is fed to the inputs of the circuits that form a proportional (blocks 4,7,8, II and 12) differential (blocks 5,7,8,11, 12 and 13) and integral ( blocks 6, 9, 10, 14, 15, and 16) are components of the action. At the same time, the parameters of the proprietary and differential components of the action are selected in the first 4 and second 5 multiplication blocks, the first inputs of which are given a flow deflection signal.

To adjust the coefficients proportional to K and the differential K components, the current value of the magnitude of the deviation from the signal, and its sign signixP, set on the output of block 7, are fed to the input of the correction circuit 7,8,9, 11,12, with which There is a dynamic indicator p, which characterizes the process of the current change in the deviation of LR ,. The value of Ap is calculated (in block 8) according to the dependence of Dr, 1 & P, -t-ot. (UP, - & P ,,) sign, for which the inputs of block 8 receive the sign signal sign P, from the output of the block 7, the signal of the current value & P, from the output of block 3 and the difference signal (P, - L P-,,) from the output of block 9.

I

If, as a result of the comparison, in block 11 (p, it turns out to be less than

Vp

GAD

those.

then the input of block 12 is given a signal for correction K and K in the direction of decreasing them, i.e. instead of Kp and K, select K, f, H K, where K

For the values of L and P that are more than specified, the correction signal is not applied and the block parameters are not saved.

a Kg / Kj

P1

When the value of xD

jarf

Claims (1)

Claims The method of automatic control of the power flow between two pressure gages is not carried out and the value of parts of the power systems by affecting the power targets or the relative increase of control power plants as a function of the magnitude of the flow deflection, its differential 15 and the integral component, the correction of proportional-differential coefficients K p and K 2 does not change. For adjusting the integral component of the coefficient K, the current value of the deviation the flow p is supplied simultaneously to the output of the multiplication unit 6 and the input of the correction circuit 9, 10, 14, 15 of the integrated component. In block 9, the values of the magnitude of the deviation at each i-th current moment are determined. DDR, (& R - & R.), so that, in order to increase the efficiency and accuracy of controlling the flow of active traffic along the transmission line, the magnitude and sign of the deviation of the power flow is remembered, the current value of the magnitude of the level of flow deviation and the dynamic increase indicator are determined that, in order to increase the efficiency and accuracy of controlling the flow of active power through the power line, they remember the magnitude and sign of the deviation of the power flow, determine the current value of The levels of the flow deflection level and the dynamic growth rate at each moment are harmful, and the first and second inputs of block 9 are fed with the flow deflection values at the current 25 points, respectively, and compared with the given values of i and (il) and time points (from the output block 10 memorization). The signal from the output of block 9 is 4 P; arrives at the input of block 14 comparison. level and rate of rise, and if the value of the level of the magnitude of the deviation of the overflow is less than the specified increase For the values of L and P that are more than specified, the correction signal is not applied and the block parameters are not saved. cash from K jarf Considering that, in order to increase the efficiency and accuracy of controlling the flow of active traffic along the power line, the magnitude and sign of the deviation of the power flow is measured, the current value of the magnitude of the level of flow deviation and the dynamic growth rate at each time point are compared. with given values men, compare them with given values. level and rate of rise and, if the level of the magnitude of the deviation of the flow is less than the specified, increase the gain factor where it is compared with a predetermined value of the integral component of the regulator uQPjaj. In the event that L & uuPja9 or, if the value of the dinato indicator from the output of block 14 to block 15 of cor-Nai4ecKoro of the increase in the rejection of the rejection is given a signal for the correction of the current less than specified the parameters of the integral component of the gain factors are proportional to the effect in block 6 in the direction of its ,, differential and differential components of the increase.