Measurements of electrical quantities. Power measurement

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 1 General Rules

Measurements of electrical quantities. Power measurement

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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1.6.13. Power measurement should be carried out in circuits:

1) generators - active and reactive power.

When installed on generators with a capacity of 100 MW or more, panel indicating instruments, their accuracy class must be no worse than 1,0.

At power plants with a capacity of 200 MW or more, the total active power must also be measured.

It is recommended to measure the total active power of power plants with a capacity of less than 200 MW if it is necessary to automatically transfer this parameter to a higher level of operational management;

2) capacitor banks with a capacity of 25 MVAr or more and synchronous compensators - reactive power;

3) transformers and lines supplying MV with a voltage of 6 kV and above thermal power plants - active power;

4) step-up two-winding transformers of power plants - active and reactive power. In circuits of step-up three-winding transformers (or autotransformers using a low voltage winding), active and reactive power must be measured from the medium and low voltage side.

For a transformer operating in a block with a generator, the power measurement on the low voltage side should be made in the generator circuit;

5) step-down transformers 220 kV and above - active and reactive, voltage 110-150 kV - active power.

In the circuits of step-down two-winding transformers, power measurement should be carried out from the low voltage side, and in the circuits of step-down three-winding transformers, from the side of medium and low voltages.

At 110 - 220 kV substations without circuit breakers on the higher voltage side, power measurement may not be performed. At the same time, places should be provided for connecting control indicating or recording devices;

6) lines with a voltage of 110 kV and above with two-way power supply, as well as bypass switches - active and reactive power;

7) at other elements of substations, where measurements of active and reactive power flows are necessary for periodic monitoring of network modes, the possibility of connecting control portable devices should be provided.

1.6.14. When installing panel indicating devices in circuits in which the direction of power can change, these devices must have a two-sided scale.

1.6.15. Registration is required:

1) active power of turbogenerators (with a capacity of 60 MW or more);

2) the total capacity of power plants (with a capacity of 200 MW or more).

See other articles Section Rules for the installation of electrical installations (PUE).

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